Dorsey Spring Trail Professional Review and Guide
"Well over half of this fairly remote trail is in the Sycamore Canyon Wilderness, which means it is open only to hiking and horseback riding past the wilderness boundary at 0.8 mile. You should plan on taking along your drinking water since the spring can be dry; in the happy event that the water is running, purify what you take to drink while your dog enjoys a splash.
Once your dog is watered and leashed up, take the path out of the parking circle. Dorsey Spring Trail 7 shares a trailhead with the Hog Hill Trail, and initially you and your dog follow an old road, so the path is somewhat rocky, wide, and exposed. You come to an unsigned fork at 0.25 mile—you will see an old gatepost—Hog Hill continues straight and the Dorsey Spring Trail takes off to the right (westerly). A winding path takes you through a lovely, mixed-age pine-juniper-oak forest, parts of which are real showstoppers in autumn: from saplings to centenarians, oaks drape the canopy and forest floor with fall color like a lavish, shimmering veil."