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The Annadel Half Marathon

The Annadel Half Marathon is a non-profit fundraising event. Over the past 9 years we have raised funds to make the park a more beautiful place for all to enjoy! Thankfully with the help of our sponsors, race participants, and volunteers this is a very successful event. We are looking forward to our 10th annual event!

The Annadel Half Marathon, 10K and 5K are considered to be one of the biggest running events in Sonoma County! 

*The Half Marathon has a 4 hour cut off time. The shorter courses are better suited for walkers. Sorry no refunds or transfers.


Registration fees

Half Marathon Closed

  1. $85.00
    Nov 15 - Apr 6

10K Closed

  1. $50.00
    Nov 15 - Apr 6

5K Closed

  1. $45.00
    Nov 15 - Apr 6

5K Youth Age 5-15 Closed

  1. $25.00
    Nov 15 - Apr 6

RACE START TIMES

8:00 a.m. Half Marathon (4 hour cut off)

8:05 a.m.10K

8:10 a.m. 5K

Contact Information

Event Location

Spring Lake Regional Park 5585 Newanga Avenue, Santa Rosa, CA, USA

Click here to view map