Old San Pablo Rd Trail Gate open to Bikers and Hikers

The San Pablo & Briones Reservoir loop offers a dynamic mountain biking experience, winding through open grasslands and dense oak woods with stunning views of both reservoirs. You'll encounter varied terrain, from paved sections and fire roads to challenging singletrack, including the unique car-free Old San Pablo Dam Road. The route provides a sense of remote tranquility, especially along the Briones Reservoir, making it a rewarding ride for those seeking natural beauty and a good workout.

This moderate 17.0-mile (27.3 km) mountain biking route features a substantial 2010 feet (613 metres) of elevation gain, typically taking around 2 hours and 10 minutes. Be prepared for some very steep climbs, particularly within Briones Regional Park, which demand good fitness. An annual permit from the East Bay Municipal Utility District (EBMUD) is necessary for certain sections around the Briones Reservoir, so check their website before you go.

What makes this loop stand out among San Pablo Briones Reservoir mountain biking routes is its blend of challenging gradients and expansive vistas, including views of Mount Diablo on clear days. The landscape is particularly vibrant and green between January and April, offering prime conditions for wildlife spotting like pelicans and blue herons. It's a fantastic option for experienced riders looking for a substantial East Bay adventure.