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Annadel Half Marathon

Name: Annadel Half Marathon
Start: 2026-04-18
End: 2026-04-18
Location: Santa Rosa

Santa Rosa, United States • 18 Apr 2026

Event overview

The Annadel Half Marathon is a non-profit fundraising race held on April 18, 2026, at Spring Lake Regional Park, 5585 Newanga Avenue, Santa Rosa, CA. The event has operated for about 15 years and donates a portion of proceeds to Trione-Annadel State Park and the Sonoma County Parks Foundation. Organizers describe the course using the trails of Annadel State Park and emphasize park stewardship and low-waste practices in honor of Earth Day (April 22).

Race details

Distances offered:

Half Marathon
10K
5K

The Half Marathon has a 4-hour cut-off time. Each participant receives a race medal, an event shirt, and post-race beverages and snacks. The event uses cup-free aid stations and refill options to reduce waste. Registration is non-refundable. Visit the organization's website for the most recent information.

United States California Santa Rosa

Race information

Registration

Half Marathon

10 km

10k

5 km

Visit the organization's website for the most recent information.

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