The trail ascends up the ridge and climbs up and down each puu to reach the Ko`olau Ridge Summit in about 6 miles. The trail initially climbs through eucalyptus, brushbox, and guava. However, once in the native forest, naupaka, koa, ohia, lobelia, olapa, and kopiko are common. The views, birds and plants observing make this lung-buster worth the climb!The latter half of the trail is not regularly maintained and may be difficult for inexperienced hikers.