Start at Siena Heights Trailhead and proceed east along Amargosa Trail. Follow Amargosa Trail until Stephanie St. At Stephanie St turn north and proceed to Wigwam Pkwy. Turn left onto Wigwam Pkwy and at the first opportunity turn right into Cornerstone Park. Ride north along the main path through Cornerstone Park, under the railroad tracks and into the Arroyo Grande Sports Complex. Continue north until you swing right and downhill to cross Pittman wash along the foot bridge. Proceed west along Pittman Washington Trail. Pittman Washington Trail dead ends at Pebble Rd. Cross Pebble Rd to proceed south along Topaz St. Turn west into Pebble Park and continue until Eastern Ave. Travel south along Eastern Ave until turning east onto the I-215 East Beltway Trail. The first right will be the Cactus Wren Trail. Continue south and eventually turning east until you cross the pedestrian bridge that spans St Rose Pkwy and returning you to the Siena Heights Trailhead.