Oahu isn’t just beaches and mai tais — it’s home to some of the most stunning hiking trails in all of Hawaii. From volcanic craters overlooking Waikiki to lush rainforest waterfalls and rugged ridgelines with 360-degree ocean views, there’s a trail here for every fitness level. Whether you just moved to Oahu or you’re planning a visit, these 12 hikes should be at the top of your list. Fees and access details verified September 2026.
1. Diamond Head (Le’ahi Summit Trail)
Distance: 1.6 miles round trip · Difficulty: Moderate · Elevation Gain: 560 ft
Let’s start with the icon. Diamond Head is Oahu’s most famous hike for good reason — the panoramic views of Waikiki, Honolulu, and the Pacific from the summit are absolutely unbeatable. The trail was originally built by the U.S. Army in 1908, and you’ll pass through old military bunkers and tunnels near the top.
What to know: Reservations are required. Non-residents pay $5 per person plus $10 for parking; Hawaii residents enter free with a valid Hawaii ID. Book at gostateparks.hawaii.gov/diamondhead — popular sunrise slots (6–7 a.m.) sell out 30 days in advance. The last reservation slot is 4 p.m. — plan to be inside the crater by 4:30 p.m. Get there early — the trail has almost no shade, and it gets hot fast after 9 a.m.
2. Lanikai Pillbox Trail (Ka’iwa Ridge)
Distance: 1.8 miles round trip · Difficulty: Moderate · Elevation Gain: 625 ft
This short but steep trail in Kailua rewards you with jaw-dropping views of the Mokulua Islands (“the Mokes”) and turquoise Lanikai Beach below. The two concrete pillboxes — old WWII military bunkers — are perfect spots to catch your breath and snap photos.
Pro tip: Sunrise here is legendary. Arrive before 6 a.m. to beat the crowds and catch the golden light hitting the Mokes. Parking is limited on the residential streets — be respectful of neighbors.
3. Manoa Falls Trail
Distance: 1.6 miles round trip · Difficulty: Easy · Elevation Gain: 400 ft
Tucked into Manoa Valley behind the University of Hawaii campus, this trail leads to a beautiful 150-foot waterfall surrounded by lush tropical rainforest. It’s one of the easiest and most rewarding hikes on Oahu, perfect for families or anyone who wants to feel like they’ve stepped into Jurassic Park (because scenes were actually filmed here).
What to know: The trail is muddy year-round — wear shoes with good grip. Don’t swim in the pool at the base; leptospirosis is a real risk in Hawaiian freshwater. Hiking the trail itself is free — the $7 fee is for the Paradise Park parking lot, which opens at 8 a.m. Temporary maintenance restrictions occasionally affect access; check dlnr.hawaii.gov before visiting.
4. Koko Head Stairs (Koko Crater Trail)
Distance: 1.8 miles round trip · Difficulty: Hard · Elevation Gain: 990 ft
If you want a serious workout with an equally serious view, Koko Head is your trail. You’ll climb 1,048 railroad tie “steps” straight up the side of Koko Crater. It’s steep, relentless, and your legs will hate you — but the 360-degree views from the top make it worth every step.
Pro tip: Go early (before 7 a.m.) to avoid the heat — the parking lot opens at 6:30 a.m. and parking is free at Koko Head District Park. Trail hours are 4 a.m. to 11 p.m. The ties can be uneven and there’s a nerve-wracking bridge section partway up. Take your time — this isn’t a race. Bring at least a liter of water.
5. Makapu’u Point Lighthouse Trail
Distance: 2.5 miles round trip · Difficulty: Easy · Elevation Gain: 500 ft
This fully paved trail on Oahu’s southeastern tip offers stunning coastal views, whale watching opportunities (November through March), and a gorgeous red-roofed lighthouse perched on the cliffs. It’s stroller-friendly and wheelchair-accessible for much of its length.
What to know: From December through April, bring binoculars — humpback whales are frequently spotted from the lookout points. If you’re adventurous, a side trail leads down to the Makapu’u tidepools, though it’s unpaved and requires careful footing. For more about family-friendly outdoor activities on Oahu, check out our beach guide.
6. ‘Ehukai Pillbox Trail (North Shore)
Distance: 2.0 miles round trip · Difficulty: Moderate · Elevation Gain: 450 ft
Located above the famous Banzai Pipeline on the North Shore, this trail gives you sweeping views of the surf breaks, Sunset Beach, and the Waianae Mountain Range. It’s less crowded than the Lanikai Pillboxes and equally photogenic.
Pro tip: During winter big wave season (November-February), watching the massive North Shore swells from this vantage point is incredible. The trailhead is off Ke Nui Road near Sunset Beach Elementary.
7. Aiea Loop Trail
Distance: 4.8 miles loop · Difficulty: Moderate · Elevation Gain: 900 ft
This shaded loop trail in Keaiwa Heiau State Recreation Area is a local favorite. You’ll hike through eucalyptus, Norfolk pine, and native Hawaiian vegetation with views of Pearl Harbor, the H-3 freeway, and the Ko’olau Mountains. There’s even a WWII plane wreckage along the trail — a C-47 cargo plane that crashed in 1943.
What to know: The trail can be muddy and slippery, especially on the eastern side. Mosquitoes are plentiful — bring repellent. This is a great option if you live near Pearl City or Aiea and want a solid after-work hike.
8. Kuli’ou’ou Ridge Trail
Distance: 5.0 miles round trip · Difficulty: Moderate-Hard · Elevation Gain: 1,800 ft
One of the best ridge hikes on Oahu, Kuli’ou’ou takes you from a residential neighborhood in Hawaii Kai up through ironwood forest to the Ko’olau summit. The payoff? An unobstructed view of both the windward and leeward sides of Oahu that will make your jaw drop.
Pro tip: The last section is steep with exposed roots and rock. Start early — clouds often roll in by late morning, blocking the summit views. This trail sees fewer tourists than Diamond Head, making it a great choice if you live in Honolulu and want a real workout.
9. Olomana Trail (Three Peaks)
Distance: 4.5 miles round trip · Difficulty: Very Hard · Elevation Gain: 1,600 ft
Olomana is not for the faint of heart. The first peak alone requires scrambling over exposed rock with ropes, and each successive peak gets more dangerous. Most hikers stop at the first peak — and honestly, that’s the smart move. The views of Kailua, Waimanalo, and the windward coast are spectacular.
Important safety note: This trail has had fatalities. The second and third peaks involve extremely narrow ridges with steep drop-offs. Only attempt peaks two and three if you’re an experienced hiker comfortable with exposed scrambling. Wet conditions make this trail significantly more dangerous.
10. Ka’ena Point Trail
Distance: 5.0 miles round trip · Difficulty: Easy-Moderate · Elevation Gain: Minimal
This flat coastal trail along Oahu’s westernmost point is totally different from the ridge and crater hikes. You’ll walk along rugged, windswept coastline to Ka’ena Point Natural Area Reserve, where Hawaiian monk seals and Laysan albatross nest. It’s wild, remote, and feels like the edge of the world.
What to know: There’s no shade and no water — bring plenty. The trail can be accessed from either the North Shore (Mokuleia) or Waianae side. The reserve gate closes at 7 p.m. You might spot spinner dolphins and whales during winter months. This hike pairs well with learning about Oahu’s weather patterns.
11. Waimano Ridge Trail
Distance: 7.0 miles round trip · Difficulty: Hard · Elevation Gain: 1,500 ft
A longer ridge hike that takes you deep into the Ko’olau Range above Pearl City. The trail passes through a variety of terrain — open ridge, dense forest, and eventually a bamboo grove near the end. The views of the Waimano Valley and windward coast are phenomenal, and you’ll likely have the trail to yourself.
Pro tip: The upper sections get extremely muddy and overgrown. Long pants and proper hiking boots are recommended. This is a great trail for residents looking to escape the tourist crowds and explore the real Oahu.
12. Crouching Lion Trail
Distance: 2.0 miles round trip · Difficulty: Hard · Elevation Gain: 800 ft
Named after the rock formation visible from Kamehameha Highway, this short but intense trail on the windward side rewards you with dramatic views of Kahana Bay and the Ko’olau ridgeline. The final push to the summit involves pulling yourself up with ropes over steep, muddy terrain — but the panoramic view is one of the most dramatic on Oahu.
What to know: This trail is not officially maintained and conditions vary. Do not attempt in rain — the steep sections become dangerously slippery. The trailhead is across from the old Crouching Lion Inn on Kamehameha Highway in Ka’a’awa.
Essential Hiking Tips for Oahu
Weather and Timing
Oahu’s weather can shift quickly, especially in the mountains. Start hikes early (ideally before 7 a.m.) to avoid afternoon heat and rain. The windward side gets significantly more rainfall than Waikiki. Always check weather forecasts before heading out, especially for ridge trails where clouds and rain create dangerous conditions.
What to Bring
- At least 1-2 liters of water per person
- Sunscreen and a hat (most trails have limited shade)
- Proper footwear — trail shoes or hiking boots, not slippers
- Bug spray (mosquitoes are relentless in valleys)
- A fully charged phone with downloaded trail maps (cell service is spotty on many trails)
Trail Etiquette and Safety
Stay on marked trails — off-trail hiking causes erosion and damages native plant habitats. Pack out everything you bring in. Don’t stack rocks (it may disturb cultural sites). If a trail says “kapu” (forbidden), respect it. Flash floods happen fast in narrow valleys — if it starts raining hard, head back immediately.
Frequently Asked Questions
What is the best beginner hiking trail on Oahu?
Makapu’u Point Lighthouse Trail is the best option for beginners. It’s fully paved, relatively flat, and offers stunning coastal views without any scrambling or steep climbs. Manoa Falls is another great easy option if you prefer a rainforest setting.
Do you need permits to hike on Oahu?
Most Oahu trails are free and don’t require permits. The main exception is Diamond Head, which requires advance reservations and costs $5 per person ($10 for parking) for non-residents — Hawaii residents enter free with a Hawaii ID. Some trails in the Waianae Range may require access permits from the Hawaii DLNR.
What is the hardest hike on Oahu?
Olomana Trail (Three Peaks) is widely considered the most challenging legal hike on Oahu. The exposed ridgeline scrambling on peaks two and three requires serious experience and carries real risk. For a tough but less dangerous option, Koko Head Stairs and Kuli’ou’ou Ridge are excellent alternatives.
Is it safe to hike alone on Oahu?
Many Oahu trails are safe for solo hikers, especially popular ones like Diamond Head, Makapu’u, and Manoa Falls. However, harder trails like Olomana and Crouching Lion should be done with a hiking partner. Always tell someone your plans, start early, and avoid hiking in heavy rain regardless of group size.