The Woodside/Purisima Creek Crossover 2026 is a premier trail running event scheduled for Saturday, April 18, 2026, in the Santa Cruz Mountains of the San Francisco Peninsula. The race traverses the lush, redwood-canopied trails of Huddart County Park and the Purisima Creek Redwoods Open Space Preserve. Known for its challenging climbs and scenic single-track paths—including the renowned Crystal Springs and Skyline Trails—the event offers distances that cater to a wide range of athletes, from local hikers to competitive ultramarathoners. The race is capped at 450 total participants to preserve the trail experience and minimize environmental impact.
| Race Distance | Start Time | Time Limit / Requirement |
|---|---|---|
| 50K | 08:30 AM | 8.5 Hour Cutoff |
| 35K | 08:30 AM | Technical single-track |
| Half Marathon | 09:00 AM | Mixed evergreen forest |
| 10K | 09:15 AM | Redwood canopy loop |
Woodside is an affluent residential community in San Mateo County with a population of approximately 5,300 residents. Nestled between the San Francisco Bay and the Pacific Ocean, it is home to many prominent figures in the technology industry. The demographic profile of Woodside is approximately 80.2% White, 10.1% Asian, 5.2% Hispanic or Latino, and 0.5% Black. The town is one of the wealthiest in the United States, with a median annual household income exceeding $250,000. Geographically, the race climbs from the valley floor through moss-covered redwoods into the drier chaparral of the ridgeline. The climate in mid-April is typically cool and damp in the canyons; average temperatures range from a low of 9°C (48°F) to a high of 19°C (66°F), though runners should be prepared for significant humidity and slick trails under the forest canopy.
The race is organized by Inside Trail Racing (ITR), which provides fully stocked aid stations featuring Skratch Labs hydration and various endurance-focused snacks. Early bib pickup is available on Friday, April 17, at the Sports Basement in Redwood City. Top finishers in each distance receive custom trophies, and all 50K finishers are awarded a signature pint glass. Registration for the event closes on the eve of the race, April 17, at 11:59 PM PT. Participants are encouraged to carry at least 20oz of water, as the distance between canyon aid stations can vary. For complete course maps and volunteer opportunities, athletes can visit the official Inside Trail website.
Apr 18, 2026
Distance — 35K
Type — Running
08:30
$115.0
Apr 18, 2026
Distance — 50K
Type — Running
08:30
$140.00
Apr 18, 2026
Distance — 21.1K
Type — Running
09:01
$100.00
Apr 18, 2026
Distance — 10K
Type — Running
09:15
$85.00
These values represent the 3-year monthly averages for April in San Mateo.
Learn more about the host city, San Mateo.
San Mateo is a town on the Peninsula in the Bay Area of California.
Read more launchWatch highlights and course previews from previous years.
Explore other exciting events happening in this same region.
location_on Burlingame, California, US
calendar_today Apr 25, 2026
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