Annadel Half Marathon

Be part of one of Sonoma County’s favorite trail running events at Annadel State Park! Volunteers play a huge role in making the Annadel Half Marathon a fun, safe, and successful day for all runners.

Volunteer opportunities include course marshals, aid stations, registration, and finish line support. Whether you come alone or with friends, it’s a great way to enjoy the event and support the running community.

Community service hours are available, and we truly appreciate your help!