Registration closes: Fri, Sep 11 @ 12:00 AM


High up on Skyline Boulevard in the Santa Cruz Mountains between the towns of Woodside and Half Moon Bay, California lies the magnificent Purisima Creek Redwoods Open Space Preserve that is open year round for trail runners to enjoy. Within the boundaries of this undeveloped and protected parkland you will find exquisite single track that offer sweeping views of the Northern California coastline. This extensive trail system winds through dark, dense strands of first and second growth redwoods and along the peaceful Purisima Creek.

At the height of the lumbering industry and during the Gold Rush, Purisima's overflowing redwood forests were being clearcut to supply the demand for the prized wood. Imagine a time when teams of oxen, lumberjacks, wagons and small cabins crowded the forests. To warn of falling trees, whistle punks would alert these bustling mills with a blaring ring of his steam whistle.

The BayTrailrunners Whistle Punk Half is the first half marathon ever held in Purisima Creek Redwoods OSP! It is open to all levels of trail runners. While it is mostly non-technical, there are some considerable uphill climbs. Experts can use this race to measure their progress, while first time racers looking for a new challenge will find this to be an excellent starting point to their trail racing adventures.

View our homespun course preview.

Hosted By: BayTrailrunners
Location: Purisima Creek Redwoods, San Mateo, CA
Date: Sunday, September 13, 2015
Sign-in and Bib Pickup: 8:00 AM - 8:45 AM at the starting line.
Start Time: 9:00 AM

Trails In Motion Film Festival

After the race, we'll be heading up to A Runners Mind in Burlingame for a 6:00 PM screening of the Trails In Motion Film Festival! Free beer and snacks for all who attend! You will have the option to purchase a discounted ticket for the show at checkout. Don't miss out on this special event!


Carpool if you can! Parking is available in the North Ridge main lot, with more spots reserved in front of the Country Store next door to the preserve. We will have an informed and upbeat volunteer point you in the right direction when you arrive.

Prizes and Shwag

All participants will receive a BayTrailrunners Whistle Punk Tech T-Shirt. To guarantee your shirt size, you must register by Thursday, September 3, 2015.

Our friends from A Runners Mind will be there supporting the race and sharing some of the latest product from their store.

Gatorade has been very kind in donating beverages and other merchandise to be handed out at the event.

Aid Stations

Aid will be provided throughout the course. You can expect fruit, carbs, sweets, water, and Gatorade sports drinks. There will be a water stop at the 6 mile mark where Grabtown Gulch and Borden Hatch Mill join. Another station with nutrition and water will be setup at the 9 mile mark at the bottom of Purisima Creek where your climb up Whittemore Gulch begins. We strongly recommend that all runners carry some form of hydration pack or water bottle throughout the race.

Thank You

Robert Rhodes
BayTrailrunners LLC
Woodside, CA

Local time: 5:29 AM


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Robert Rhodes
Race Director

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