Anza Borrego Cuyamaca 50 Mile Run (ABC 50) is a point-to-point trail ultra "from mountains to desert," starting at the Sunrise Trailhead in Cleveland National Forest, climbing into Cuyamaca Rancho State Park and over Stonewall Peak, then dropping through Oriflamme Canyon onto the desert floor to finish at Stagecoach Trails RV Resort in Shelter Valley. The net-downhill course carries a 14.5-hour cutoff and limited crew access at only three of its seven aid stations.