Walnut Canyon Trail is a 4 mile out and back trail located near Flagstaff, AZ and is good for all skill levels. The trail is primarily used for hiking and mountain biking and is accessible from April until November. 4.0 miles Out & Back kid friendly hiking mountain biking Expand Map Sign up now to see this map! Reviews (0)Photos (0)Recordings (2)No one has reviewed this trail yet. Be the first!