East Ridge and Round Top Loop

The terrain on this loop offers a varied experience. You'll encounter sections that are generally considered a good, fast ride, with some steep climbs but nothing overly technical. While the Round Top Loop itself is primarily known for hiking and can be rocky, the wider fire trails and paved roads within Sibley Volcanic Regional Preserve, which are part of this route, are suitable for cycling. Expect a mix of well-maintained paths and some more rugged sections, typical for a moderate mountain biking trail.

Given its moderate difficulty rating, this loop is generally best suited for intermediate mountain bikers. While it's not overly technical, there are steep sections and a total elevation gain of over 460 meters, which might be challenging for absolute beginners. Riders should have some experience with varied terrain and sustained climbs.

You generally don't need a specific permit to mountain bike on designated trails within Reinhardt Redwood Regional Park and Sibley Volcanic Regional Preserve. However, it's crucial to be aware of specific regulations, especially in Sibley Volcanic Regional Preserve, where bicycles are not allowed on narrow-gauge trails, including certain sections of Round Top Road. Always stay on marked trails where cycling is permitted. There are no entrance fees for these parks.

A convenient starting point with parking is the Skyline Gate Staging Area. This provides direct access to the trails and is a popular spot for beginning the loop.

The East Bay climate generally allows for year-round mountain biking. However, the best times are typically spring and fall when temperatures are mild and the scenery is vibrant. Summer can be warm, so an early start is advisable. Winter rides are possible, but be prepared for potentially muddy conditions after rain, especially on unpaved sections.

This loop offers diverse scenery and several viewpoints. You'll pass by the Round Top Loop Trail, and enjoy views from the Upper San Leandro Reservoir overlook, Redwood Overlook from East Ridge, and East Ridge Overlook. In Sibley Volcanic Regional Preserve, you can also see unique geological features like exposed bedrock formations from an extinct volcano, and on clear days, views of Mount Diablo and Mount Tamalpais are possible.

Yes, both Reinhardt Redwood Regional Park and Sibley Volcanic Regional Preserve are generally dog-friendly. However, dogs must be kept on a leash at all times to protect wildlife and ensure the safety of other trail users. Always remember to pack out any waste.

Yes, the route incorporates sections of several other trails. You'll ride along significant portions of the East Ridge Trail, and also pass through parts of the Lamorinda Trail Loop, Bay Area Ridge Trail - 02 - East Bay, East Bay Skyline National Recreation Trail, Phillips Loop, Redwood Trail, Lafayette-Moraga Trail, Round Top Loop Trail, Volcanic Trail, and Canyon Trail, among others.

A highlight of this loop is the opportunity to explore the unique volcanic geology of Sibley Volcanic Regional Preserve. You can observe exposed bedrock formations from a 10-million-year-old extinct volcano, including basalt dikes and tuff breccias. The preserve also features intriguing labyrinths, which are popular points of interest.

While the overall loop is rated moderate and covers a significant distance (nearly 24.5 km) with considerable elevation gain, certain flatter, wider sections within Reinhardt Redwood Regional Park and Sibley Volcanic Regional Preserve might be suitable for older, more experienced children. However, the full loop is generally not recommended for young children or beginner family riders due to its length and difficulty.

While the parks themselves have restrooms at various staging areas, including potentially near the Skyline Gate Staging Area, there are no cafes or pubs directly at the trailheads. You would need to venture into nearby towns like Oakland or Orinda for dining options and other amenities.