Oser Wall

Oser Wall is a climbing area in California's Inyo National Forest, within the White Mountain Ranger District. It is managed by the Forest Service, and the surrounding country is a cluster of crags and routes. Two other climbing areas, Raspberry Wall and Trailerpark, sit just 0.1 and 0.2 miles away, which makes it easy to build a longer day of climbing around this corner. The climbing here is a mix of sport and trad, with 15 routes in all. The YDS grades run from 5.8 to 5.13b/c, so there is something for climbers of every ability. The median grade is 5.11a, and among the named routes are the trad Old mystery route at 5.8 and the sport Bearhug Arete at 5.11+. The Halo of Ignorance, a 5.13b/c trad route, is the hardest of the lot. Summer is the most comfortable time to visit. At a weather station near Mammoth Lakes, typical July averages run to a high of 78°F and a low of 49°F, while winter highs typically stay around 41°F. That station sits at about the same elevation as the wall, so its figures are a fair guide to what to expect here. Nearby, the Morgan Mine Road and Mount Julius Caesar hikes are both under 2 miles away. Mosquito Flat Backpacker Campground is about 5 miles off, and Rock Creek Lake Campground is a little farther.