Castle Peak, Mountain summit in Nevada County, California

Castle Peak is a 2,773-metre summit in the Sierra Nevada, in Nevada County, California, near Donner Pass and the Nevada border. It rises 446 metres above the surrounding terrain and takes its name from its conical shape. The peak lies in Tahoe National Forest, close to the Pacific Crest Trail and beside Castle Pass.

Castle Peak was first named Mount Stanford by the Whitney Survey, which worked in California between 1860 and 1874, after Leland Stanford. The present name refers to the mountain's conical shape, not to three towers. On 17 February 2026 an avalanche on the peak killed nine skiers.

Castle Peak lies near Castle Pass on the Pacific Crest Trail, in the Tahoe National Forest close to Donner Pass and the Nevada border. The peak's name comes from its conical shape, and the mountain was first called Mount Stanford after Leland Stanford by the Whitney Survey of 1860–1874.

Castle Peak lies in Tahoe National Forest, just off the Pacific Crest Trail and beside Castle Pass, near Donner Pass and the Nevada border. The summit stands at 2,773 metres, about 446 metres above the surrounding terrain. Donner Pass averages 411.5 inches of snow a year, so the approach is best made when the snow has cleared.

Castle Peak was first named Mount Stanford by the Whitney Survey of 1860–1874, after Leland Stanford; the present name refers to its conical shape. The summit rises to 2,773 metres, about 446 metres above the surrounding terrain, and lies roughly 15 km west of Truckee.