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Registration fees

Don Ritchie 5K Walk/Run Closed

    1. $30.00
      Mar 6 - May 18
    2. $35.00
      May 19 - May 26

Marin 10K Closed

    1. $30.00
      Mar 6 - May 18
    2. $35.00
      May 19 - May 26

Youth Track Races Closed

12 & Under

Going Green

Tamalpa Runners is trying to minimize the environmental impact of this event by providing recycling bins at the start/finish area for cardboard, drink containers, etc. Compostable cups will be used at the aid stations. Bring your old running shoes and we will recycle them.


For your safety and the safety of others, runners are requested not to wear headphones during the Races.

Time Limitations

Because of time constraints imposed by setting the track up for the Youth Track Races, the finish line may be dismantled approximately one hour and ten minutes after the start of the 10K race. Runners finishing after that time will be hand timed and their results may not be available on race day.

Baby Strollers

Baby strollers are not permitted in the 10K.  They are permitted in the 5K, but please no racing and start toward the back of the pack.

Event Schedule

  • May 29 6:30 AM PDT - Race Day Registration Opens

  • May 29 8:00 AM PDT - Don Ritchie 5K Walk/Run

  • May 29 8:30 AM PDT - Marin 10K

  • May 29 9:45 AM PDT - Awards Ceremony

  • May 29 10:00 AM PDT - Youth Track Races

Contact Information

Event Location

College of Marin, College Avenue, Kentfield, CA, United States

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