Whistle Punk Half

Date: New date coming soon
Start Time: 9:00 AM
Event: Half Marathon
Location: Purisima Creek Redwoods - San Mateo, CA
Pricing: $55

View Maps and Course Directions

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. 

Race Day Information

Parking: Carpool if you can! Parking can get a little cramped in the North Ridge main lot,  but we can also fit a number of cars 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. 

Sign-In & Bib Pick-Up: 8:00AM - 8:45AM at the starting line. 

Briefing: 8:50AM at the starting line

Start: 9:00AM


  • All participants will receive a BayTrailrunners Whistle Punk T-Shirt.

  • First place finishers will each be awarded gift cards from our race sponsor, A Runners Mind.

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

Time Limit: We have the space booked for the entire afternoon so don't worry about any time limits. 

Timing: We will be using the timing software that Utrasignup has generously supplied to us. 

Marking: The course will be marked with striking blue ribbon with clear and easy to read signage pointing you in the right direction. Details will be explained at the pre-race briefing. 

Course measurements: Our data has been collected using Google Earth and cutting edge GPS devices. The detailed information gathered and displayed is provided by 3rd-parties and BayTrailrunners LLC cannot guarantee the accuracy of this information. Provided for reference only. 

Rules: No dogs, bikes or strollers. Stay on marked trails. Yield to park personnel and other visitors. Do not litter. Thank the volunteers! 

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 will be setup at 9 miles with nutrition and water 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. 

Restrooms: Restrooms are located at the start and at the intersection of Purisima Creek and Whittemore Gulch. 

Cancellations and Refunds: Entry fees are non-refundable and non-transferable to future BayTrailrunners events. BayTrailrunners however, will be happy to send you a 75% or 50% entry coupon if you let us know at least 2 weeks or 48 hours before the event, respectively. No shows without notice forfeit any reimbursements for a BayTrailrunners event. Please email us so we know in advance what your plans are.