The trail winds through tunnels and over wooden footbridges between the 100-foot walls of Johnston Canyon, which in many places are only 18 feet apart. Much of the trail is along catwalk set into the sides of the canyon, on which you walk over rapids on your way to Lower Johnston Canyon Falls (at 0.8 miles) and the more impressive Upper Johnston Canyon Falls (at 1.8 miles) plunging through the canyon. The hike to the Upper Falls takes about 1 ½ hours. The trail continues for another 3 miles to the "Inkpots" a series of bubbling colorful pools formed by hot springs coming up through the colored rocks. The hike to the Inkpots takes about 4 hours.