The Buttermilk Boulders — commonly called the Buttermilks or the Milks — are a world-class bouldering destination in the foothills of the Sierra Nevada about eight miles west of Bishop via Highway 168 and Buttermilk Road. The area sits on BLM-managed land at roughly 5,000 feet elevation and features massive glacial erratic boulders made of quartz monzonite, some towering over 40 feet. The rock is known for its coarse texture and sweeping blank faces, producing a style of bouldering that ranges from accessible moderate problems to some of the most celebrated highball climbs in the world — including iconic problems like The Mandala, Evilution, and High Plains Drifter. Climbers come from around the globe during the cooler months (fall through spring); summers can be prohibitively hot. Buttermilk Road is a dirt road that can be rough and requires high clearance; check conditions before visiting. Camping is available in the area but not in the immediate boulder parking zones. A pit toilet is located at the Birthday Boulder parking area. Land is managed cooperatively by BLM, LADWP, Inyo County, and the USFS.