The Upper Sycamore Canyon Trail is a 1.3 mile trail connects to the bottom of steep Sycamore Canyon Fire Road on the west to the Danielson Road trail on the east.
The trail goes deep into the canyon and can get quite overgrown, especially after solid winter rains. But it is an interesting hike and alternative to other trails that take you to "The Waterfall" in the Boney Mountain Wilderness. Bike and dogs are not allowed on these back country trails. Watch out of course for poison oak and snakes.
After you enter the west end of the Upper Sycamore Canyon Trail, within about a 1/10th of a mile is the entry point to the Fossil Trail, a very steep trail that leads up to the Old Boney Trail.
After the substantial rains of Winter 2017, a creek has been flowing through this canyon and has caused some obstacles and overgrown sections of the trail. Do wear good hiking shoes.