Difficulty: Easy Length: 1.8 miles Estimated Time: 1 hour (roundtrip) The trail can be quite muddy, so proper closed toe footwear is recommended. Unfortunately, swimming is not allowed at the pool base of the waterfall but the views alone justify this easy hike. Admission is free, but there's a small parking fee.
Difficulty: Easy Length: 1.5 miles Estimated Time: 1 hour (roundtrip) One and done type of hike, quite touristy and can get very busy but overlooks the city of Waikiki. You're indeed standing on top of an extinct Volcano. Reservations are required and there’s cost for both entry and parking.
Level: Hard Length: 1.6 miles Estimated Time: 1.5 hours (roundtrip) “The stair master of death” or “stair master in paradise”; pick your poison. The 1,000+ step walking track consists of abandoned railroad ties that run along the crater's west side to the top of Koko Crater. Be prepared to get your steps in.
Difficulty: Moderate - Hard Length: 5.3 miles (roundtrip) Estimated Time: 2.5 - 3.5 hours Located in the St. Louis Heights area, this trail is an out-and-back, go-as-far-as-you’d-like trail. It ends at the crossroads of Kolowalu trail and Wa'ahila trail, but if you're looking for a bit of a challenge you can follow the trail all the way to the top of Mt. Olympus. This should NOT be attempted by beginner hikers. If you do choose to go past it, be aware the trail gets skinnier and has numerous rope sections that you'll have to climb to reach the summit.
Difficulty: Hard Length: 4.1 miles (roundtrip) Estimated Time: 2.5 - 3 hours This trail consists of different ecosystems; a rainforest to a dry forest, then pine groves. The trail is steep and can be wet/slippery so prepare for muddy conditions. On a clear day, the views from the top are outstanding, as you'll see a full 360-degree view of Diamond Head, Koko Head, and out to the East Side in Waimanalo. Climbing will be involved.