Sonora Pass, Mountain pass in Sierra Nevada, United States

Sonora Pass is a mountain pass in the Sierra Nevada where State Route 108 crosses at an elevation of 2933 meters (9623 feet). The road connects Alpine County with Mono County and passes through mountain terrain with several viewpoints and natural transitions.

The first documented immigrant crossing was by the Clark-Skidmore Company wagon train in late summer 1852. After silver and gold mining developed east of the Sierra Nevada in the early 1860s, merchant interests on both sides pushed for a road; surveying began in 1863 and the road was in use by 1865. In the 1880s the California and Nevada Railroad proposed a narrow-gauge line over the pass, but it never built track beyond the San Francisco Bay Area.

The Pacific Crest Trail crosses through Sonora Pass, drawing long-distance hikers who travel the mountain terrain during summer months. This route connects different regions and gives hikers a natural pathway through the mountains.

The highway over the pass generally closes between November and May because of snow accumulation. The road is narrow and winding, exceeding 8% for most of the traverse and reaching 26% grades in places, so unusually wide, heavy or long vehicles are not recommended. A picnic and parking area beside the summit serves as a day-use rest stop and trailhead.

East of the summit, Route 108 runs for about 10 km through the Marine Corps Mountain Warfare Training Center, a military reservation where the road crosses the pass's high ground. The Pacific Crest Trail crosses Highway 108 at the pass itself, and a picnic and parking area there serves as a trailhead for Sonora Peak and Wolf Creek Lake.