The Gaviota Tunnel (officially known as the Gaviota Gorge Tunnel) is a tunnel on U.S. Route 101 and California State Route 1 completed in 1953 in the center of Gaviota State Park, 33 miles (53 km) northwest of Santa Barbara, California on the Gaviota Coast. It is 420 feet (130 m) long and 17.5 feet (5.3 m) tall. Only the northbound lanes of US 101 pass through it, as the southbound lanes descend from Gaviota Pass through a narrow canyon to the west of the tunnel. Because it is the only major route between the Santa Barbara County South Coast and the Santa Ynez Valley, bicycles are allowed through it. There is a rest area for both southbound and northbound lanes on the southern end of the tunnel, the southernmost one along U.S. Route 101.