Socal - San Bernardino County - Mount Baldy NickNames: #MankeaFlat/ThunderMt.
Take the I10 Frwy into Upland, exit on Mountain Ave. and travel north about 7.5 miles to Mt. Baldy Rd. Turn right (north) and drive another 7.5 miles or so to Manker Flat Campground. You can park at the campground. The trail and gate are on the left side of the road. Thomas Guide page: 512 E1