Sonoma County offers an unusually diverse network of trail systems, ranging from steep and technical terrain to rolling “California carpet” singletrack and coastal trails. Ascend trains across many of these parks throughout the year, using different trail systems to support specific training objectives, seasonal conditions, and race preparation.
These trails shape our training and define the Ascend experience. The resources on this page are intended to help runners navigate the areas we use most often and explore them confidently on their own.
Each trail page includes:
- A brief overview of the trail system or park
- Recommended routes commonly used for training runs
- Parking information and available facilities
- Notes to help runners navigate terrain, access points, and common considerations
Accessing Local Trails
Many of the trail systems we use require day-use fees or annual passes:
Sonoma County Regional Parks Pass
Provides access to Sonoma County Regional Parks, including Shiloh Ranch and North Sonoma Mountain. Annual passes are available, with discounted options for seniors and veterans. Day-use fees are also available at many locations.
California State Parks Pass (State Park Poppy Pass)
Provides access to California State Parks, including Annadel State Park and Sugarloaf Ridge State Park. Annual and day-use options are available depending on location.
Details, pricing, and eligibility vary by park system. Refer to the official park websites for current information.
Trail Use Expectations
Ascend runners share trails with hikers, cyclists, equestrians, and other park users. We expect all participants to train with awareness and respect.
- Yield appropriately and communicate clearly when passing
- Run single file on narrow trails and avoid widening the trail
- Follow posted park rules and stay on designated routes
- Leave no trace and pack out all trash
- Keep group sizes manageable and be mindful of other users
Training well includes taking care of the places we run. Respect for the trails and the broader community is part of being an Ascend runner.
Ascend Trail Running 