2 trails
Haʻena
The most dramatic coastal trail in the United States — 11 miles of Na Pali cliffs with no road access and no way out except back the way you came. Two day-hike options: (1) First 2 miles to Hanakapiʻai Beach (1–2 hours each way) — this alone delivers clifftop views that rival anything in Hawaii; the beach at the end is a remote black sand cove, swimming prohibited due to shore break. (2) Continue 3.5km inland from the beach to Hanakapiʻai Falls (add 3 hours round trip) — a 91m waterfall in a jungle amphitheater. Plan 5–6 hours total for beach + falls. Trail is extremely muddy after rain; add 30–60% to time estimates and wear closed-toe shoes with grip.
Hanalei
The Nā Ala Hele ridge trail climbs about 1,230 ft in 2.3 miles to Kaukaopua, with the best view there is of Hanalei Valley's taro fields and the bay. Go early before the heat and clouds, and skip it the day after rain: the red dirt turns steep and slippery, and there are landslide-prone cliff edges. Hunting is allowed in the area, so stay on the trail.