Cobblestone, Canyon, Marsh, Ridge, South Burma, & Warren Richardson Trails loop

This loop is considered a moderate to hard mountain bike ride, requiring good fitness and advanced riding skills in some sections. Trione-Annadel State Park is known for its technical trail network, featuring rocky terrain with numerous rock gardens and boulders that demand careful line choices. You'll encounter a mix of technical singletrack and fire roads.

The full loop, covering approximately 25.8 km (16 miles), typically takes around 2 hours and 30 minutes to 3 hours to complete on a mountain bike, depending on your pace and skill level. This duration accounts for the challenging terrain and technical sections.

You can access the loop from various points within Trione-Annadel State Park. A common starting point with parking is near the main entrance off Channel Drive in Santa Rosa. Be sure to check for specific parking regulations and availability upon arrival.

Dogs are generally permitted in Trione-Annadel State Park, but they must be kept on a leash at all times. Please ensure you clean up after your pet to help keep the trails enjoyable for everyone.

Trione-Annadel State Park typically has a day-use parking fee. You can find current fee information and any permit requirements on the official California State Parks website: ca.gov.

The best time to mountain bike this loop is generally during the spring (April-May) and fall months. In spring, you'll experience pleasant temperatures and can enjoy the park's vibrant wildflowers. Fall offers cooler weather and beautiful foliage. Summers can be hot, and winter rides might be affected by rain, making some technical sections more challenging.

Along this loop, you'll experience diverse scenery including shaded forests, open meadows, and oak woodlands. A key highlight is the picturesque Lake Ilsanjo. You'll also traverse sections of the challenging Cobblestone Trail and the scenic Warren Richardson Trail.

No, this loop is generally not recommended for beginner mountain bikers. The terrain includes highly technical singletrack, numerous rock gardens, and challenging climbs, particularly on the Cobblestone Trail. It requires good fitness and advanced riding skills.

The Cobblestone Trail section is particularly challenging, often described as 'brutal' on the uphill with highly technical singletrack and rock gardens. Be prepared for sections where you might need to dismount and push your bike unless you are a highly skilled rider. The park's consistent technical challenges are its hallmark.

Trione-Annadel State Park is home to various wildlife. You might spot deer, rabbits, and a variety of bird species. Keep an eye out for reptiles like lizards and snakes, especially during warmer months. Remember to observe wildlife from a distance and never feed them.

Yes, this loop utilizes and connects several trails within Trione-Annadel State Park's extensive network. The route includes sections of the Bay Area Ridge Trail - 01 - North Bay, Ridge Trail, Cobblestone Trail, South Burma, Marsh Trail, Canyon Trail, and Warren Richardson Trail, among others, allowing for many customizable ride options.