This is a difficult out and back trail to Horsetrough Spring in Cleveland National Forest, Santa Ana Mountains. The route includes the summit of Beek's Place and leads into Blackstar Falls and Silverado Canyon. 

Total round trip mileage is about 20 miles. Trail descriptions below: Sourced by Jeff Hester in the following article: 

This 50-mile route is a circumnavigation of the Raleigh Greenway system. This route links several trails to form one loop. With the exception of 5 miles of single track, the greenway is paved asphalt. Route began at the trailhead at the intersection of the House Creek Trail and Crabtree Creek Trail behind the Crabtree Valley Mall.