Sonoma County's Premier Trail Race!
April 6, 2025
The Annadel Half Marathon is a non-profit fundraising event. Over the past 14 years, we have raised funds to make the park a more beautiful place for all to enjoy!
The Half Marathon course is a hilly, and technical course designed for the experienced trail runner looking for a challenge. Enjoy gorgeous scenery with green meadows, wild flowers, and variety of beautiful trees. The race starts at the Spring Lake swimming lagoon on a grassy field and winds through Spring Lake Park before climbing into Annadel State Park.The Annadel Half Marathon is a tough course with over 1,500 feet of elevation gain over rocky and rooted terrain. The 5k course is an out and back route starting at the swimming lagoon, heading up a gravel fire road slightly into Annadel State park.
The Half Marathon course is a hilly, and technical course designed for the experienced trail runner looking for a challenge. Enjoy gorgeous scenery with green meadows, wild flowers, and variety of beautiful trees. The race starts at the Spring Lake swimming lagoon on a grassy field and winds through Spring Lake Park before climbing into Annadel State Park.The Annadel Half Marathon is a tough course with over 1,500 feet of elevation gain over rocky and rooted terrain. The 5k course is an out and back route starting at the swimming lagoon, heading up a gravel fire road slightly into Annadel State park.
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