Recommended Users: Equestrians, Hikers, Mountain Bikers. Two-track trail. 1 mile in length. Difficulty: Easy/Easiest. Cholla Trail is an old road. In the future, a trailhead will be located at its northern terminus, but for now, please do not leave the Santa Clara River Reserve as the other side of the gate is private property. Combine the Cholla Trail with Lower Graveyard Trail for a pleasant loop through desert country.