Net proceeds from the Marin County Half Marathon help children learn how to swim at the YMCA.

Days until the race.








Win Tickets for Hamilton the Musical!

Purchase raffle tickets for a chance to see Hamilton at the Orpheum Theater in San Francisco on Friday evening, August 16, 2019 — two excellent orchestra seats!

Winner will be randomly drawn and announced at the Marin County Half Marathon on April 28, 2019. The winner does not need to be present.

1 Raffle Ticket – $10

6 Raffle Tickets – $50

13 Raffle Tickets – $100

Do you have more than 6 employees, co-workers, and friends and want to get involved?

Why support the Sustainable Sports Foundation?

With your support, we funded Spring Splash Week at the YMCA for 350 kids.

To learn more about Sustainable Sports Foundation events & where your money goes, please click here.

Donate via PayPal:

Latest News & Race Updates


Where & When is Packet Pick up? Friday, April 22 - Sports Basement Presidio, 610 Old Mason Street, San Francisco - 3 pm till 7 pm Saturday, April 23 - Andronico's Community Market Marin, 100 Center Boulevard, San Anselmo - 10 am till 2 pm Can participants pick up...

Run with Us This Saturday April 9th!

Join us this coming Saturday morning, April 9 for our run in the park!   Rain or Shine, of course.   It will be on part of the Marin County Half Marathon course with multiple distances available, from 2-3 miles, 5-6 miles and up. Some road, some trail.   Led by our...

Run With Us This Saturday Morning!

Everything is shaping up for our April 24 Marin County Half Marathon, 10k & 5k ~ and we are so glad you will be part of the party!!   More information will be coming soon about the event, but did want to let you know about a training run this Saturday morning,...