The Braddock Tunnel is a tunnel that runs through the eastern edge of Mount Chiliad, and is located in Braddock Pass, Blaine County.
It carries southbound Senora Freeway (northbound Route 1) traffic, and it serves as a passageway for people passing in and out.
The tunnel is based on the Gaviota Gorge Tunnel in Gaviota State Park.
The tunnel is driven through by Michael and Trevor when pursuing the kids that Franklin challenged to a race in the mission, I Fought The Law.
Also, in the mission Paleto Score Setup in which Michael, Trevor, and Lester drive through it when returning to the meth lab.