Pine Valley Bridge

The bridge over Pine Creek is 450ft tall and based on two hollow concrete structures that support each traffic lane. These structures provide access to vantage points from where to run a 300+ft fully aerial rappel, which is the main attraction of this destination.

DO NOT PARK ON THE HIGHWAY! You will get ticketed, towed, arrested or worse. Park at any of the valid parking spots indicated in the map: After parking walk roughly along the highway bushwacking your way through and making sure you stay way off the pavement. There's a paved shoulder/emergency lane plus another dirt shoulder, you may stay at the outer skirts of the dirt edge and be able to safely access the bridge without disrupting traffic. It is possible to hike from Corte Madera Road (~1 mile away) using cow trails/illegal immigrant trails to get to Pine Creek but the bushwhacking is terribly unpleasant. Park at the nearby Pine Creek trailhead (adventure pass required) and hike in on the trail. After maybe 1.5 miles (?) you'll go through a gate on the trail. Hike a little bit more until it goes back down to the river and cross it here (you'll likely see a wrecked orange truck on the other side up the hill). Scramble up past this truck until you get up to the west-end side of the bridge. Enter either bridge (if the manhole is bolted shut, then try to squeeze through the expansion gap around the corner from the manhole).

Enter the bridge tunnels through manholes under the concrete structures located at either corner of the bridge (SW, NW, SE, NE) or squeeze through the expansion joints located at each corner. Once inside find one of the gaps in the concrete, set up anchor and rappel down it. There's 4 possible rappeling location, the tallest rappel is probably on the South West side, and the second tallest is the South East side. They seemed all to be the same size, but things may change seasonally. These gaps ARE TIGHT. You can test yourself through the expansion joints before going through the rappel gaps. If you fit in those you will fit in the other. NOTE: The expansion joints are tighter on the EAST side of the bridge. This is a 300' drop with an awkward start, so we recommend the following precautions: