Briones Reservoir loop

The terrain is quite varied, typical of the East Bay. You'll encounter fire roads, some singletrack, and both paved and unpaved sections. Expect significant climbs, some reaching an 11% grade, though they are generally not sustained for long distances. Parts of the route, like Briones Road, are dirt/gravel, and the Old San Pablo Dam Road has crumbling asphalt but is bikeable. Be prepared for 'lumps in the road' in areas where cows graze, especially after muddy seasons.

This route offers beautiful views of the Briones Reservoir, San Pablo Bay, and the surrounding rolling hills. From higher elevations, you might even spot Suisun Bay, the Delta, San Ramon Valley, and Mount Diablo. Key points of interest include the Iron Horse Trail junction, Arroyo Del Hambre, Alhambra Valley, and the Little John Cove overlook of Briones Reservoir. You'll also cross the San Pablo Creek Bridge and Las Trampas Creek bridge.

Spring is an excellent time to visit, as the hills are vibrant with wildflowers, adding to the picturesque scenery of valleys, rolling hills, and grasslands. The route also offers forested patches for shade, which can be welcome during warmer months.

Yes, the route intersects with several other trails. You'll find sections of the Lamorinda Trail Loop, ADT - California - T - Seg 8, Mokelumne Coast to Crest Trail, and the Iron Horse Regional Trail, among others. It also touches parts of the Briones to Mt. Diablo Regional Trail and Bear Creek Trail.

Given its 'difficult' rating, approximately 64 km distance, and over 900 meters of elevation gain, this specific loop is generally not recommended for beginners. It requires good to very good fitness due to steep climbs and varied terrain. However, Briones Regional Park does offer 'Easy' routes with less elevation gain for all fitness levels.

Yes, a recreational permit might be required for some parts of the Briones Reservoir loop, specifically those on East Bay Municipal Utility District (EBMUD) land. It's advisable to check the EBMUD website for current permit requirements before your ride.

Specific trailhead parking information is not detailed in the provided data, but the route is accessible from the Walnut Creek area. For routes within Briones Regional Park, various staging areas offer parking. It's best to consult a detailed map or the park's official website for designated parking lots closest to your intended starting point.

While Briones Regional Park generally allows dogs, specific rules may apply to different areas, especially on EBMUD lands or in pilot program zones where bike and horse access might alternate. Always check the latest regulations for the specific sections of the loop you plan to ride, including leash requirements.

The Briones Reservoir loop offers a significant and scenic cycling experience that feels remote despite its proximity to urban centers. It provides diverse terrain, from paved sections to challenging singletrack, and panoramic views of the reservoir, San Pablo Bay, and surrounding hills. The opportunity to see abundant wildflowers in spring and ride car-free sections like the Old San Pablo Dam Road adds to its unique appeal.

Touring cyclists should be prepared for very steep climbs, though often short, and varied surfaces including dirt, gravel, and crumbling asphalt. Some downhills can have an 8% grade with narrower, bumpier roads. The route demands good fitness. Also, be aware of potential alternating day access for bikes and horses in certain park areas on weekends.

From higher elevations and ridgetops, you can enjoy expansive views that may include Suisun Bay, the Delta, the San Ramon Valley, and even Mount Diablo. The Little John Cove overlook of Briones Reservoir offers a particularly good perspective of the reservoir itself.