Nu'alolo Trail Professional Review and Guide
"This popular trail leads to one of the finest views of the Na Pali Coast. It can be combined with the Awa’awapuhi Trail via the Nu’alolo Cliff Trail to make a 9-mile semi-loop. It is an upside-down hike, so start early, take plenty of water, and do not overestimate your stamina. Many people find it a struggle to get back up to the trailhead before dark. If it is raining do not go past the Nu’alolo Cliff Trail junction to the viewpoint. It is on a narrow, exposed, slippery ridge, very dangerous if wet.
From the trailhead sign, head up the service road to the trail on the left (west). The trail climbs over a hump, then begins a slippery, muddy scramble over tree roots down along a streambed (on your right) lined with a combination of native koa trees and karakanut trees, an exotic species with big dark shiny green leaves. This part of the trail is almost always wet."