Wailele Falls Trail is a 3.9 mile lightly trafficked out and back trail located near Laie, HI that features a waterfall and is good for all skill levels. The trail is primarily used for hiking and walking and is accessible year-round.
A permit is required to hike this trail. Access is on private land. Permits are managed by Hawaii Reserves Inc. See their website for an application: http://www.hawaiireserves.com/pdf/HRI_Hiking_Application.pdf
This is NOT an easy trail. Not a big elevation change but a lot of scrambling over slippery rocks, tree roots, and many creek crossings. Easy to lose the trail so be sure after about 1/2 mile you follow the pink ribbons on the trees. A small waterfall at the end runs into a small, swimmable pool.
Located behind PCC. Drive down until you see a green no trespassing sign to the left. Park there. Walk the trail all the way down until you reach a farm metal shed turn left, cross over the stream and follow the trail. As long as you keep walking up stream you will reach the waterfall. :)