"Not all that wander are lost." — The Green Leprechaun
From the new I-210 Freeway extension, exit Baseline Road in Claremont. Go west on Baseline and turn right (north) onto Padua Avenue. In 1.7 miles turn right onto Mt. Baldy Road (stop sign). After 1.5 miles (about 0.3 miles past San Antonio Dam) you'll see roadside turnouts on your left and right. The hike begins on your left (west) at the locked vehicle gate.
From the I-10 Freeway, exit on Indian Hill Blvd in Claremont. Head north to Foothill Blvd and turn right. Turn left on Mills Avenue. In a couple miles it veers right to become Mount Baldy Road. After the stop sign at Padua Avenue, continue 1.5 miles (about 0.3 miles past San Antonio Dam) you'll see roadside turnouts on your left and right. The hike begins on your left (west) at the locked vehicle gate.
Since you are just outside the forest boundary, no National Forest Adventure Pass is needed.
The trail head starts on Mt. Baldy Road about 2500ft north of the dam. (N34° 9.790' W117° 40.931')
Walk past the locked vehicle gate and follow the wide fire road as it begins a brief descent to the right into Evey Canyon. The road then turns west with the canyon and follows along the south slope above the creek. Many ost of the trees were burned by a forest fire a few years ago.
After about 1.7 miles of walking along Evey Motorway, you reach a junction at a saddle. The road, marked 1N04, begins to descend to the west, but you will take a sharp left turn onto the road that heads southeast to the summit. After a couple minutes the road dips down to a small saddle and you can see where mountain bikers have worn a route along the steep ridge to the top. Continue on the road as it climbs the north and northeast flank of Potato Mountain. As you near the top, the road bends to the right then in a couple minutes the road bends left to achieve the summit. The concrete water tank provides a nice spot for enjoying the vistas. The panoramic views are striking. It is a tradition for people to bring potatoes and leave them on the cement platform on the top. I do not know why Potato Mountain is called Potato Mountain.
Note: It is a little tricky finding the location, it is actually half way up the mountain..so if you pass tunnels you went way too far.