Maunawili Falls

Maunawili Falls rewards hikers with a 20-foot waterfall that drops into a deep, swimmable pool surrounded by dense tropical vegetation. The 3-mile roundtrip trail winds through Oahu's interior rainforest, crossing streams and muddy sections that require sturdy hiking shoes with good traction. The moderate trail takes most visitors 1.5 to 2 hours to complete. Expect slippery rocks, tree roots, and stream crossings that become treacherous after heavy rains. The path stays relatively shaded under the forest canopy, making it cooler than coastal hikes. Swimmers find the pool refreshing but cold, with depths reaching 8 feet near the falls. The rocks around the pool turn extremely slippery when wet. Strong swimmers only should venture near the waterfall itself, as the current creates dangerous undertows. Park along Maunawili Road near the trailhead, arriving between 6 AM and 8 AM since spaces fill quickly on weekends and holidays. No entrance fees apply. Morning visits offer the best lighting for photos and fewer crowds before tour groups arrive around 10 AM. Bring plenty of water, snacks, and a waterproof bag for electronics. Pack reef-safe sunscreen, insect repellent, and a towel if you plan to swim. The trail becomes impassable during heavy storms, so check weather conditions before heading out. Winter months from December through March bring more frequent rain and muddier conditions. This hike suits adventurous families with children over 12 and adults comfortable with uneven, muddy terrain. Those seeking an easy walk should choose other Oahu waterfalls. The combination of forest hiking and swimming makes Maunawili Falls popular with locals and visitors who enjoy moderate outdoor challenges requiring sure footing.