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Annadel Half Marathon

Annadel Half Marathon

  • Running
  • Half Marathon
  • 10k
  • 5k
5585 Newanga Avenue, Santa Rosa, CA, USA
Race Roster

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About the Event

Annadel Half Marathon/10K/5K

The Annadel Half Marathon is a non-profit fundraising event that, over the past 14 years, has raised significant funds to help make the park a more beautiful place for everyone to enjoy. Thanks to the incredible support of our sponsors, participants, and volunteers, this has become one of Sonoma County’s premier running traditions — and we’re excited to return in 2026 !

The Half Marathon, 10K, and 5K are among the biggest running events in Sonoma County, drawing runners of all levels to the scenic trails of Annadel State Park.

  • Half Marathon: 4-hour cut-off time
  • 10K & 5K: Great options for walkers and first-time participants

Policies: Sorry, no refunds or transfers

Join us for a day of running, community, and supporting the park we all love! Protect the Place You Race. In honor of Earth Day (April 22), we’re running low-waste aid stations, cup less refills, and park stewardship—because every mile should leave Annadel better than we found it. A portion of proceeds is donated to Trione-Annadel State Park and the Sonoma County Parks Foundation.

How to get there

Courses

Tickets

This event is not sold through Apuama. Check prices and availability directly on the organizer's website.
Register for Half Marathon$119.68
Register for 10K$71.53
Register for 5K$60.83
Event Website

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