Annadel Half Marathon

The Annadel Half Marathon, along with its 10K and 5K events, is a prominent non-profit fundraising race held in Sonoma County. Over the past 14 years, it has successfully raised funds to enhance the beauty of the local park. The challenging Half Marathon course features over 1,500 feet of elevation gain, winding through scenic landscapes of meadows, wildflowers, and diverse trees.

The event is designed for experienced trail runners, while the shorter courses are more accessible for walkers. Proceeds from the race support park improvements, making it a community-focused event. Registration for the 2025 event is currently open. Visit the organization's website for the most recent information.