» Official Trail Map: Good quality map showing various trails. Also, see Text Side of the map and Valley Floor area.
To Welch Creek Road (3.0 miles): From the main parking lot for Sunol, follow trails going north, cross a bridge, then turn left onto Shady Glen Trail (0.3 miles) → continue along Flag Hill Trail (1.3 miles) → Flag Hill Road (0.8 miles) → left on High Valley Road (0.4 miles) to reach Welch Creek Road. Turn left, walk along Welch Creek Road (0.2 miles).
Maguire Peaks Loop (5.1 miles): From Welch Creek Road, turn right onto Lower Maguire Peaks Trail (0.8 miles) → left on Maguire Peaks Loop Trail (3.1 miles) → left on Lower Maguire Peaks Trail (0.8 miles). A side trip to Maguire Peaks (0.4 miles round trip) is worthwhile. The trail is not shown on the map. See GPS tracks for its location.
To Main Parking Lot (4.3 miles): From Welch Creek Road, walk south along the road (0.2 miles) → right on High Valley Road (0.4 miles) → left on Vista Grande Road (1.1 miles) → right on Eagle View Trail (0.6 miles) → right on Eagle View Road (0.2 miles) → right on Cave Rocks Road (0.3 miles) → left on Indian Joe Creek Trail (1.5 miles) to return to the main parking lot.
Notes: The initial climb to Flag Hill is pretty steep: about 1000 ft elevation gain in 1.2 miles. The climb is made worthwhile by majestic views of lush green valley views. Vista Grande is another trail with awesome valley views. Indian Joe Creek Trail is especially pleasant when it meanders next to a creek.