The Lee Vining Canyon provides the route for California State Route 120 (Tioga Pass Road), the main road crossing Yosemite. Due to the ruggedness of the area, the construction of the road along the sheer canyon walls during the 1930s was the most difficult part of the trans-Sierra crossing. Route 120 joins U.S. Route 395 in Lee Vining just north of the US 395 bridge over Lee Vining Creek.