Summit Rock Half Marathon
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Event
Summit Rock takes place on December 13, 2025 at Sanborn Regional Park in Saratoga, California. The course runs through redwood groves in the Santa Cruz Mountains, on miles of single-track trails and forested terrain just outside Silicon Valley. Walkers and hikers are welcome; the event includes a separate hiker start for half marathon participants planning to take longer than 3.5 hours.
Race details
Distances offered:
- Half marathon
- 10K
- 5K
Half marathon and 10K routes include climbs to peaks that provide views; all distances use single-track trails. Races are professionally timed with electronic chip timing. All finishers receive custom finisher medals. The half marathon is part of the Brazen Ultra Half Series, a series whose events often measure slightly longer than 13.1 miles and include significant ascents and descents on varied trails. A remote runner option is listed for the event. Registration is offered with multiple pricing tiers. Visit the organization's website for the most recent information.