20th Annual Petaluma River Marathon

Since 2004, the Petaluma River Marathon has served as the West Coast flat-water marathon/half marathon championship. It is one of the most beautiful and fun races on the West Coast. This year marks our 20th Anniversary!

Participants have ranged an array of experiences from ocean rowers, Olympians, and super paddlers to enthusiastic beginners. Bring plenty of water and food to get you through the race, then we’ll relax together afterward on the adjacent Foundry Wharf green with a potluck feast. 

The race can be viewed from Petaluma River Park (start/finish); along the river trail through Alman Marsh (from the Sheraton) and from the lookout at Shollenberger Park and along the riverside portion of Shollenberger trail. Gilardi's Lakeville Marina is a good place to view the half-marathon turnaround as well as marathoners as they head out and back. Sundrop Sauna now has a semipermanent sauna and plunge out there. There’s also a picnic table and restrooms.  The NBRC boatyard will not be able to host spectators.