Manoa Falls is one of the most popular waterfall hikes on Oahu, and for good reason. The trail leads through a lush rainforest to a 150-foot waterfall. It’s a relatively easy walk, though it can get muddy, especially after rain. Swimming isn’t allowed, but the view at the end is well worth it. This is a great half-day activity, especially if you're staying near Honolulu or looking for something close to town.
Location: Manoa Valley, just outside Honolulu
Hike: 1.8 miles round-trip
Difficulty: Easy to moderate