Briones Reservoir and San Pablo Reservoir loop

The full loop is approximately 53.7 km (33.4 miles) and is rated as difficult. For a touring bicycle, you should plan for around 4 hours, though this can vary based on your fitness level and how often you stop to enjoy the views.

The route features a mix of surfaces. While predominantly paved, you'll also encounter unpaved sections, gravel roads, and some singletrack. Be prepared for significant elevation changes, with some climbs reaching steep grades of 7% to 11%. After rain, some areas can become muddy with clay that aggressively sticks to tires.

You'll enjoy diverse and expansive views of the Briones and San Pablo Reservoirs, the East Bay hills, Mount Diablo, and San Pablo Bay. From higher points, you might even spot the Sacramento River Delta and Mount Tamalpais. The trail passes through open, grass-covered hillsides, dense oak woods, and areas with wildflowers. Keep an eye out for pelicans, geese, deer, and coyotes.

Yes, there are several scenic spots. You'll pass by Inspiration Point Overlook, offering great vistas. Other highlights include the Little John Cove overlook of Briones Reservoir and the Kennedy Grove - San Pablo Dam Overlook and Trailhead. Don't miss the car-free section of the Old San Pablo Dam Road for a peaceful ride with great views.

Spring and fall generally offer the most pleasant cycling conditions with milder temperatures. Spring brings wildflowers, while fall provides clear views. Summers can be hot, and some ridge-top sections offer little shade. Be aware that conditions can be muddy after winter rains.

Yes, an annual permit from the East Bay Municipal Utility District (EBMUD) is required to access the Briones Reservoir trail sections of this loop. Make sure to obtain this before your ride.

While specific parking lots aren't detailed, the loop is accessible from various points around Berkeley and the reservoirs. Many cyclists start near the Kennedy Grove - San Pablo Dam Overlook and Trailhead or other access points around the reservoirs. Check local regulations for parking availability and fees.

Bicycles are permitted on designated trails only. While dogs are generally allowed in some regional parks, specific rules for the EBMUD lands around the reservoirs may vary. It's best to check the latest EBMUD regulations regarding dogs on their trails, as permits and leash rules often apply.

Yes, the route incorporates sections of several other trails. You'll find yourself on parts of the ADT - California - T - Seg 8, Mokelumne Coast to Crest Trail, Bay Area Ridge Trail - 02 - East Bay, and the Old San Pablo Trail, among others. The Nimitz Way, known for its views, also links to other cycling circuits in the area.

You can find facilities at the San Pablo Reservoir Marina, Boat rental and Café, which offers a place to stop for refreshments. Otherwise, facilities are limited directly on the trail, so plan accordingly and carry enough water and snacks.

Bicycles are permitted on designated trails only. It's important to remember that horses always have the right-of-way. Be mindful of other trail users and adhere to all posted signage, especially regarding EBMUD permit areas.