Oahu is paradise for hikers and nature lovers.

Oahu is paradise for hikers and nature lovers.

Sure, Oahu has long been known as a prime spot for surfing, swimming with dolphins, and indulging in island flavors. However, it is also chock full of beautiful scenery and challenging treks. Thus our need to share the 22 best things to do in Oahu for nature lovers is strong. Our list contains various hikes ranging in difficulty and access. Thereby, this guide proves itself to be your trusted and authoritative guide for the best things to do in Oahu. Pack your hiking shoes and get ready!

Sure, Oahu has long been known as a prime spot for surfing, swimming with dolphins, and indulging in island flavors. However, it is also chock full of beautiful scenery and challenging treks, thereby inspiring our need to share the 20 best things to do in Oahu for nature lovers. Our list contains various hikes ranging in difficulty and access, thus proving itself to be your trusted and authoritative guide for the best adventures and things to do in Oahu.

1. Lahilahi Point

Lahilahi Point

For your first excursion and one of the best things to do in Oahu, we've decided to ease you into it. Lahilahi Point is a short, relatively easy hike that is great for all. In about 20 to 30 minutes, trekkers make the ascent to Lahilahi Point. Once at the top, views from Kaena Point to Waianae welcome you to Oahu. Because this hike is near the beach, it is perfect for a quick excursion before a relaxing day of fun and sun.

For your first trek and one of the best things to do in Oahu, we've decided to ease you into it. Lahilahi Point is a short, relatively easy hike that is great for all. In about 20 to 30 minutes, trekkers make the ascent to Lahilahi Point. Once at the top, views from Kaena Point to Waianae welcome you to Oahu. Because this hike is near the beach, it is perfect for a quick excursion before a relaxing day of fun and sun.

2. Spitting Cave

Spitting CaveThings to do in Oahu - Spitting Cave

Credit: Wikimedia Commons, Anthony Quintano

Spitting Cave offers adrenaline junkies their fix! Here, divers jump from the above cliffs into the awaiting caves. The water rushes into the caves as the waves roll in. Thus the cave is filled with water before spitting it back out with great force. Be forewarned, even experienced divers and jumpers are a bit hesitant about jumping into the caves. This is not for the faint of heart!

Spitting Cave offers adrenaline junkies their fix! Here, divers jump from the above cliffs into the awaiting caves. The water rushes into the caves as the waves roll in. Thus the cave is filled with water before spitting it back out with great force. Be forewarned, even experienced divers and jumpers are a bit hesitant about jumping into the caves. This is not for the faint of heart!

3. Pink Pillbox Hike

The Pink Pillbox Hike is not one of the most popular things to do in Oahu, but offers a chance for fresh air nonetheless. To enumerate on the name of this hike, one must dissect its meaning. “Pink” refers to the pillbox's color, which acts in homage to breast caner victims and survivors. The “Pillbox” refers to an abandoned military pillbox used to watch for incoming ships, planes, and intruders during World War II. In total, there are five pillboxes on the ridge, which takes less than one hour to hike. Even though it isn't an Oahu favorite, the Pink Pillbox Hike gets your blood pumping and shows great views of Oahu.

4. Koko Head Stairs

Koko Head StairsThings to do in Oahu - Koko Head Stairs

Credit: Max Pixel

During World War II, the U.S. military designed these “stairs” to easily transport personnel and supplies. In its glory today, the Koko Head Stairs consist of 1,048 railroad ties (the steps). Once complete, another 30 feet ahead, visitors find a lookout with impeccable views. The Head Stairs are a popular thing to do in Oahu for athletes, who often time themselves. If you're in need of a scenic overlook and a workout simultaneously, the Koko Head Stairs do the trick!

5. KoKo Crater Arch

During World War II, the U.S. military designed these “stairs” to easily transport personnel and supplies. In its glory today, the Koko Head Stairs consist of 1,048 railroad ties (the steps). Once complete, another 30 feet ahead, visitors find a lookout with impeccable views. The Head Stairs are a popular thing to do in Oahu for athletes, who often time themselves. If you're in need of a scenic overlook and a workout simultaneously, the Koko Head Stairs do the trick!

The Koko Crater Arch is a must-try thing to do in Oahu. This rock formation sits upon the edge of the Koko Crater. Visitors walk underneath the rock or on top of it. A favorite photo-op is to pretend you are holding the arch up. Moreover, this is a premier Oahu spot for watching the sunrise.

6. Makapu'u Lighthouse Trail

Makapu'u Lighthouse TrailThings to do in Oahu - Lighthouse Trail

Credit: Flickr, Deb Nystrom

The Makapu'u Lighthouse Trail on the east side of Oahu is a great family thing to do in Oahu. The paved trail is easily accessible, clearly marked, and suitable for all experience levels. For those looking for a greater challenge, there is an optional off-trail choice. This allows trekkers the opportunity to navigate down the side of the cliff to meet the relaxing tide pools. Regardless of which option you choose, the Makapu'u Lighthouse Trail provides scenic views. Even better, this trail is dog friendly!

7.  Ka'au Crater Hike

The Makapu'u Lighthouse Trail on the east side of Oahu is a great family thing to do in Oahu. The paved trail is easily accessible, clearly marked, and suitable for all experience levels. For those looking for a greater challenge, there is an optional off-trail choice. This allows trekkers the opportunity to navigate down the side of the cliff to meet the relaxing tide pools. Regardless of which option you choose, the Makapu'u Lighthouse Trail provides scenic views. Even better, this trail is dog friendly!

The Ka'au Crater Hike is packed with waterfalls! Visitors are lead up to three waterfalls by following the trail. Then, trekkers navigate a narrow ridge on the edge of a crater. This part is a bit tricky as it requires a vertical rope climb. The harrowing experience is worth it though! Once conquered, the Ka'au Crater boasts views in all directions of Oahu. However, be advised that this hike takes anywhere from 4 to 6 hours depending on your fitness level and how often you stop for photos.

8. Cockroach Cove

Cockroach CoveThings to do in Oahu - Cockroach Cove

Credit: Wikimedia Commons, FeldBum

Despite its unpleasant name, Cockroach Cove is far from its namesake. The Halona Blowhole sits next to this prime spot and offers a perfect thing to do in Oahu. Here, visitors see turtles feeding in the area. Additionally, several rock formations and little caves serve up the chance to do some extracurricular exploring.

Despite its unpleasant name, Cockroach Cove is far from its namesake. The Halona Blowhole sits next to this prime spot and offers a perfect thing to do in Oahu. Here, visitors see turtles feeding in the area. Additionally, several rock formations and little caves serve up the chance to do some extracurricular exploring.

9. Crouching Lion

Crouching Lion is a short, but steep incline hike on the northeastern side of Oahu. The spot overlooks the Kahana Bay and shares its killer views, steep drop-offs, and lush foliage with trekkers. Additionally, hikers can expect views of quaint Kaawa town below, the Pu'u Manamana cliffs, and cool little caves hidden within the cliffs. For the most comprehensive experience and added background information, we suggest one of the many guided tours through the area.

10. Halona Blowhole

Halona BlowholeThings to do in Oahu - Halona Blowhole

Credit: Wikimedia Commons, NapNet

As mentioned above, the Halona Blowhole sits near Cockroach Cove on the eastern side of Oahu. As waves crash on the cliffs and under the rocks, the water ejects itself from the blowhole. It truly looks like water shooting into the air. Keep in mind that weather conditions and tides play a huge role in this natural phenomena. In fact, locals use the phrase, “The rougher the day, the bigger the spray.” Regardless, travelers revel in the natural wonder that is the Halona Blowhole.

As mentioned above, the Halona Blowhole sits near Cockroach Cove on the eastern side of Oahu. As waves crash on the cliffs and under the rocks, the water ejects itself from the blowhole. It truly looks like water shooting into the air. Keep in mind that weather conditions and tides play a huge role in this natural phenomena. In fact, locals use the phrase, “The rougher the day, the bigger the spray.” Regardless, travelers revel in the natural wonder that is the Halona Blowhole.Pink Pillbox HikeThe Pink Pillbox Hike is not one of the most popular things to do in Oahu, but offers a chance for fresh air nonetheless. To enumerate on the name of this hike, one must dissect its meaning. “Pink” refers to the pillbox's color, which acts in homage to breast caner victims and survivors. The “Pillbox” refers to an abandoned military pillbox used to watch for incoming ships, planes, and intruders during World War II. In total, there are five pillboxes on the ridge, which takes less than one hour to hike. Even though it isn't an Oahu favorite, the Pink Pillbox Hike gets your blood pumping and shows great views of Oahu.

11. Wiliwilinui Ridge Trail

Our parents always told us the world doesn't revolve around us. However, the Wiliwilinui Ridge Trail gets you pretty close to being the center of the universe…or at least the center of Oahu. Here, narrow trails and lush scenery lead hikers on an extremely muddy and slippery trek. Parts of the trail do not contain stairs, thereby necessitating the need to pull oneself up with a rope. Even still, promise of views of Waikiki, Koko Crater, and Diamond Head entice you to keep pushing. Once at the summit, Wililinui Ridge spreads expansive coast-to-coast views before travelers. Being able to see the entire island lends to a sense of feeling as though you are at the center of Oahu (or the universe, however you want to play it). Despite its dirt and mud, Wililinui Ridge Trail is one of the greatest things to do in Oahu.

12. Judd Trail and the Jackass Ginger Pool

Judd Trail and the Jackass Ginger PoolThings to do in Oahu - Jackass Ginger Pool

Credit: Flickr, Eric Tessmer

Just off the Pali Highway, the Judd Trail is a piece of mystery and a great thing to do in Oahu. Trekkers note the change from island jungle paradise to mainland woodland forests along the trail. The change is a stark contrast to the rest of Oahu. This simple hike takes travelers on a one mile loop and features a bamboo forest, intimidatingly tall pine trees, swinging ropes, and rocky water slides into the giant swimming hole known as the Jackass Ginger Pool. Although somewhat of a departure from what travelers expect of Oahu, this slice of tranquility causes you to marvel at its existence and majesty.

13. Mermaid Caves

We cannot guarantee you will actually be able to experience the Mermaid Caves if you are looking for cool things to do in Oahu. This is in due to the secrecy regarding the location of the Caves. You can try your hand at asking locals, but chances are you may be met with tight lips. Thus, we recommend scouring blogs and maps to find this hidden treasure. Here, water flows in from the ocean into underground caves. A low ceiling and colorful interior give this spot an almost magical and enticing feel. If you're lucky enough to find where the Mermaid Caves are, you won't be disappointed with one of the best kept secrets in Oahu.

Just off the Pali Highway, the Judd Trail is a piece of mystery and a great thing to do in Oahu. Trekkers note the change from island jungle paradise to mainland woodland forests along the trail. The change is a stark contrast to the rest of Oahu. This simple hike takes travelers on a one mile loop and features a bamboo forest, intimidatingly tall pine trees, swinging ropes, and rocky water slides into the giant swimming hole known as the Jackass Ginger Pool. Although somewhat of a departure from what travelers expect of Oahu, this slice of tranquility causes you to marvel at its existence and majesty.

14. Chinaman's Hat

Chinaman's HatThings to do in Oahu - Chinaman's Hat

Credit: Wikimedia Commons, Cristo Vlahos

Chinaman's Hat is a small island near the Kualoa Ranch and getting there is an adventure in itself. To access the hike, trekkers need to kayak, swim, or wade (if low tides permit) to the island. Once there, travelers immediately notice the seemingly odd shape of the island. By way of illustration, it is so named because it resembles a traditional rice picking hat. Upon completing the hike, sweeping views of the shore and Kualoa Mountain greet hikers and offer excellent photo-ops. Furthermore, if you're lucky, you may spot a seal sunbathing on the rocks!

15. Hanauma Bay Rock Bridge

This hike is one of the most rewarding things to do in Oahu. The hike winds trekkers around the cliffs above the Hanauma Bay and towards the ocean. Upon following the path all the way, trekkers can venture down to the cliffs below where there is a small rock bridge. Although it may look tempting to walk across, it is highly recommended that you refrain from doing so. The waves crash upon the surface of the rock bridge, creating the potential for overly ambitious hikers to be swept away. Even still, admiring from a distance gifts travelers with the sight of an incredible natural phenomena and the perfect photo-op.

Chinaman's Hat is a small island near the Kualoa Ranch and getting there is an adventure in itself. To access the hike, trekkers need to kayak, swim, or wade (if low tides permit) to the island. Once there, travelers immediately notice the seemingly odd shape of the island. By way of illustration, it is so named because it resembles a traditional rice picking hat. Upon completing the hike, sweeping views of the shore and Kualoa Mountain greet hikers and offer excellent photo-ops. Furthermore, if you're lucky, you may spot a seal sunbathing on the rocks!

16. The Mokes

The MokesThings to do in Oahu - The Mokes

Credit: Wikimedia Commons, Cristo Vlahos

The best way to access the Mokes and one of the best things to do in Oahu is to kayak! The Mokes refers to the Na Mokulua' Islands, which means “The Two Islands” in Hawaiian. If you are in need of a peaceful retreat from Oahu's busy center, look no further. After a 30 minute kayak from Lanikai or Kailua Beach, the isolated islands welcome trekkers with open arms. Here, sea turtles, coral, and plenty of other flora are visible. In addition, the Mokes are a great spot for cliff jumping. For instance, the Queen's Bath is a small tide pool that is deep enough to jump in. However, if this isn't quite your speed, the Mokes also contain the best sunrise hike, the Lanikai Pillbox Trail (more on that to come).KoKo Crater ArchThe Koko Crater Arch is a must-try thing to do in Oahu. This rock formation sits upon the edge of the Koko Crater. Visitors walk underneath the rock or on top of it. A favorite photo-op is to pretend you are holding the arch up. Moreover, this is a premier Oahu spot for watching the sunrise.

The best way to access the Mokes and one of the best things to do in Oahu is to kayak! The Mokes refers to the Na Mokulua' Islands, which means “The Two Islands” in Hawaiian. If you are in need of a peaceful retreat from Oahu's busy center, look no further. After a 30 minute kayak from Lanikai or Kailua Beach, the isolated islands welcome trekkers with open arms. Here, sea turtles, coral, and plenty of other flora are visible. In addition, the Mokes are a great spot for cliff jumping. For instance, the Queen's Bath is a small tide pool that is deep enough to jump in. However, if this isn't quite your speed, the Mokes also contain the best sunrise hike, the Lanikai Pillbox Trail (more on that to come).

17. Pali Notches

This hike is for experienced hikers and climbers only! Strong gale force winds and threateningly steep drop offs on either side make this one of the most dangerous things to do in Oahu. Even still, it is also one of the most rewarding. The notches to be scaled by hikers came about in the 1700s as a place for King Kamehameha's warriors to hide cannons and keep the Nu'uanu Valley safe. After ascending each of the “notches”, hikers face a vertical “chimney” rock face which must be climed with the assistance of a rope. At this point, it is essential to maintain balance and your center of gravity to avoid being toppled over by the strong gusts. Trekkers who climb over the chimney will see views of the Konahuanui Ridge below. While one of the scariest hikes to complete, trekkers who make the journey are certified bad-asses.

Ka'au Crater HikeThe Ka'au Crater Hike is packed with waterfalls! Visitors are lead up to three waterfalls by following the trail. Then, trekkers navigate a narrow ridge on the edge of a crater. This part is a bit tricky as it requires a vertical rope climb. The harrowing experience is worth it though! Once conquered, the Ka'au Crater boasts views in all directions of Oahu. However, be advised that this hike takes anywhere from 4 to 6 hours depending on your fitness level and how often you stop for photos.Crouching LionCrouching Lion is a short, but steep incline hike on the northeastern side of Oahu. The spot overlooks the Kahana Bay and shares its killer views, steep drop-offs, and lush foliage with trekkers. Additionally, hikers can expect views of quaint Kaawa town below, the Pu'u Manamana cliffs, and cool little caves hidden within the cliffs. For the most comprehensive experience and added background information, we suggest one of the many guided tours through the area.

18. Stairway to Heaven

Stairway to HeavenThings to do in Oahu - Stairway to Heaven

Credit: Wikimedia Commons, Kirinwizard

We would be remiss if we failed to mention that this excursion is highly illegal — complete with steep fines and police response. However, we would also be remiss if we failed to mention one of the best things to do Oahu (despite questions of its legality). Nonethessless, hiking the Stairway to Heaven is a rewarding experience if you don't get caught. This site is the former home of the U.S. Navy's secret facility for transmitting radio signals. 3,922 stairs compose the Haiku Stairs up the mountain. At the summit sits an old satellite atop a small bunker. Those undeterred by massive fines sit atop the bunker as the sun comes up. While the view is definitely worth it, we will leave it up to you to make the call on one of the best things to do in Oahu.

19. Kaniakapupu Ruins

We would be remiss if we failed to mention that this excursion is highly illegal — complete with steep fines and police response. However, we would also be remiss if we failed to mention one of the best things to do Oahu (despite questions of its legality). Nonethessless, hiking the Stairway to Heaven is a rewarding experience if you don't get caught. This site is the former home of the U.S. Navy's secret facility for transmitting radio signals. 3,922 stairs compose the Haiku Stairs up the mountain. At the summit sits an old satellite atop a small bunker. Those undeterred by massive fines sit atop the bunker as the sun comes up. While the view is definitely worth it, we will leave it up to you to make the call on one of the best things to do in Oahu.Wiliwilinui Ridge TrailOur parents always told us the world doesn't revolve around us. However, the Wiliwilinui Ridge Trail gets you pretty close to being the center of the universe…or at least the center of Oahu. Here, narrow trails and lush scenery lead hikers on an extremely muddy and slippery trek. Parts of the trail do not contain stairs, thereby necessitating the need to pull oneself up with a rope. Even still, promise of views of Waikiki, Koko Crater, and Diamond Head entice you to keep pushing. Once at the summit, Wililinui Ridge spreads expansive coast-to-coast views before travelers. Being able to see the entire island lends to a sense of feeling as though you are at the center of Oahu (or the universe, however you want to play it). Despite its dirt and mud, Wililinui Ridge Trail is one of the greatest things to do in Oahu.

The Luakaha Waterfall Trail throws surprises at hikers left and right. The short, and relatively easy trail leads to the Luakaha Waterfalls, as well as a secluded historical throwback. The Kaniakapupu Ruins greet travelers with a healthy dose of history. It is rumored to be the former summer home of King Kamehameha III. Venture back and envision day to day life while standing amongst the ruins of what once was.

20. Manoa Falls

Manoa FallsThings to do in Oahu - Manoa Falls

Credit: Flickr, Eli Duke

Manoa Falls is one of the most popular things to do in Oahu. Situated just minutes from bustling Waikiki, it's no surprise why. This short adventure leads travelers up to a 150 foot waterfall careening down the side of the mountain. Not only is the beauty stunning, these falls also hosted filming of scenes from Jurassic Park and Lost. If you are short on time but not on spirit, Manoa Falls answers your calls.

Manoa Falls is one of the most popular things to do in Oahu. Situated just minutes from bustling Waikiki, it's no surprise why. This short adventure leads travelers up to a 150 foot waterfall careening down the side of the mountain. Not only is the beauty stunning, these falls also hosted filming of scenes from Jurassic Park and Lost. If you are short on time but not on spirit, Manoa Falls answers your calls.Mermaid CavesWe cannot guarantee you will actually be able to experience the Mermaid Caves if you are looking for cool things to do in Oahu. This is in due to the secrecy regarding the location of the Caves. You can try your hand at asking locals, but chances are you may be met with tight lips. Thus, we recommend scouring blogs and maps to find this hidden treasure. Here, water flows in from the ocean into underground caves. A low ceiling and colorful interior give this spot an almost magical and enticing feel. If you're lucky enough to find where the Mermaid Caves are, you won't be disappointed with one of the best kept secrets in Oahu.

21. Lanikai Pillbox Hike

Lanikai Pillbox Hike

As promised earlier, we've included the Lanikai Pillbox Hike on our list. Located near the Mokoluas (the Mokes) in Kaiwa Ridge, this is one of Oahu's easier, but equally rewarding trails. Trekkers watch the sun rise over the Mokoluas whilst sitting atop an abandoned pillbox nearly 600ft above all else. Although the hike is steep, it is relatively short. Be advised that the trail is not clearly marked. Nonetheless, travelers note that it is easy to follow. To make it in time to see the sun paint its first clouds with color, we recommend you begin hiking about 30 to 40 minutes before the sun is due to come up.

As promised earlier, we've included the Lanikai Pillbox Hike on our list. Located near the Mokoluas (the Mokes) in Kaiwa Ridge, this is one of Oahu's easier, but equally rewarding trails. Trekkers watch the sun rise over the Mokoluas whilst sitting atop an abandoned pillbox nearly 600ft above all else. Although the hike is steep, it is relatively short. Be advised that the trail is not clearly marked. Nonetheless, travelers note that it is easy to follow. To make it in time to see the sun paint its first clouds with color, we recommend you begin hiking about 30 to 40 minutes before the sun is due to come up.Hanauma Bay Rock BridgeThis hike is one of the most rewarding things to do in Oahu. The hike winds trekkers around the cliffs above the Hanauma Bay and towards the ocean. Upon following the path all the way, trekkers can venture down to the cliffs below where there is a small rock bridge. Although it may look tempting to walk across, it is highly recommended that you refrain from doing so. The waves crash upon the surface of the rock bridge, creating the potential for overly ambitious hikers to be swept away. Even still, admiring from a distance gifts travelers with the sight of an incredible natural phenomena and the perfect photo-op.

22. Diamond Head Crater Hike

Diamond Head Crater HikeDiamond Head Crater Hike

Credit: Wikimedia Commons, Eric Tessmer

This is by far one of the most popular things to do in Oahu, and one of the best hikes around. To enumerate, the 30 minute hike takes traverers to the location of several old war bunkers left over from Fort Ruger. This military installation served as Hawaii's first military base, as well as now being the go-to spot for travelers when the first arrive in Oahu. The Diamond Head upon which the bunkers sit was formed from the Ko'olau volcano and offers amazing views of Waikiki and the Pacific Ocean. The affordable $1 admission is complimented by Diamond Head's close proximity to many of Oahu's hotels. Locals and fellow tourists alike recommend making this your first stop in order to get a sense of your Oahu bearings.

This is by far one of the most popular things to do in Oahu, and one of the best hikes around. To enumerate, the 30 minute hike takes traverers to the location of several old war bunkers left over from Fort Ruger. This military installation served as Hawaii's first military base, as well as now being the go-to spot for travelers when the first arrive in Oahu. The Diamond Head upon which the bunkers sit was formed from the Ko'olau volcano and offers amazing views of Waikiki and the Pacific Ocean. The affordable $1 admission is complimented by Diamond Head's close proximity to many of Oahu's hotels. Locals and fellow tourists alike recommend making this your first stop in order to get a sense of your Oahu bearings.Pali NotchesThis hike is for experienced hikers and climbers only! Strong gale force winds and threateningly steep drop offs on either side make this one of the most dangerous things to do in Oahu. Even still, it is also one of the most rewarding. The notches to be scaled by hikers came about in the 1700s as a place for King Kamehameha's warriors to hide cannons and keep the Nu'uanu Valley safe. After ascending each of the “notches”, hikers face a vertical “chimney” rock face which must be climed with the assistance of a rope. At this point, it is essential to maintain balance and your center of gravity to avoid being toppled over by the strong gusts. Trekkers who climb over the chimney will see views of the Konahuanui Ridge below. While one of the scariest hikes to complete, trekkers who make the journey are certified badasses.The Luakaha Waterfall Trail throws surprises at hikers left and right. The short, and relatively easy trail leads to the Luakaha Waterfalls, as well as a secluded historical throwback. The Kaniakapupu Ruins greet travelers with a healthy dose of history. It is rumored to be the former summer home of King Kamehameha III. Venture back and envision day to day life while standing amongst the ruins of what once was.Kaniakapupu Ruins

Oahu provides nature lovers with endless beauty and photo-ops.

There are so many things to do in Oahu for nature lovers! This island seeks to prove that beauty begins in nature, while simultaneously keeping hikers on their toes. If you want to see the best of Oahu and get your exercise at the same time, these 22 activities are a must! Being that Oahu is a place of immense beauty, there is no doubt that there are even more hikes than we could feature on this list.

Tell us about your favorite Oahu hikes in the comments!

There are so many things to do in Oahu for nature lovers! This island proves that beauty begins in nature while simultaneously keeping hikers on their toes. If you want to see the best of Oahu and get your exercise at the same time, these 22 activities are a must! Being that Oahu is a place of immense beauty, there is no doubt that there are even more hikes than we could feature on this list.Tell us about your favorite Oahu hikes in the comments!

Related Article: ​​Guide to the Hawaiian Islands​​​

12 Unique Things to do on the Big Island