The Ledges loop is a nice, more technical loop that can be added on to the Phil's World
ride. There is a well signed left turn just before you get to the Rib Cage. The singletrack winds through some sagebrush, then drops into some pinon and juniper trees with a few ledges and rocky sections.
The trail is easy to follow as it makes away up and down the shallow drainages. You'll eventually emerge out of the trees into a large open, burned area where the trail loops around and then does a short but very steep climb back to the top of the ridge. Just past the top of the climb there is an option to go left and shortcut over to the Stinking Springs
loop where the trails meet up just past the Pinnacle.
To continue with the Ledges loop, continue straight for some more semi-technical riding through trees and openings until the trail merges back in to the main Phil's loop just past where you left it.