Summit Rock Half Marathon, 10K & 5K

Saturday, December 9, 2023 • Saratoga, CA • Course Map

The lush, wooded hills and slopes of Northern California’s Santa Cruz Mountains offer plenty of challenging climbs and descents along the trails at the early winter running of the Summit Rock Half Marathon, 10K & 5K, named for the peak of the same name here in Sanborn County Park just outside Saratoga.

With its more than 3,600 acres filled with redwoods and oak trees, and mountain trails perfect for hiking, camping and picnicking virtually year-round, the peaceful forest oasis of Sanborn County Park lies just a short drive from some of California’s densest urban environments.

The downtown areas of nearby San Jose and San Francisco lie nearby, as well as the offices, factories and crowded interstate highways of Silicon Valley to the east and south.

Set for its 9th annual running as the late fall is giving way to the early winter season, the Summit Rock half marathon will take runners along densely wooded single-track trails that organizers add can be quite challenging, with steep uphills and downhill stretches.

For that reason, they add, runners can expect the need to walk in several stretches in order to conserve energy for the downhills and flatter areas along the trail.

The race takes runners up to a number of mountain peaks inside the park, and the course will follow an out-and-back route that starts and finishes not far from the park’s visitor center, located just off Sanborn Road.

Race Weather & Climate

Nestled along the western edge of California’s Silicon Valley, just over 13 miles from downtown San Jose and roughly 50 miles southeast of San Francisco, the small city of Saratoga typically experiences cool and often cold conditions in the early winter.

In December, average monthly temperatures range between 57°F and 39°F — on the day of the race (Dec. 9), the average high is 59°F and the average low is 38°F — while precipitation totals average just over 4 inches for the month.

Past Results

Course Map

See the race route map for the Summit Rock Half Marathon here.

Starting Time

  • 7:30 AM – half marathon hikers
  • 8:30 AM – half marathon
  • 8:45 AM – 10K
  • 9:00 AM – 5K


  • $74 – $89 for the half marathon
  • $57 – $73 for the 10K
  • $50 – $64 for the 5K


To reserve your spot in the early winter 2023 running of Saratoga’s Summit Rock Half Marathon, 10K or 5K race, register online at here.

Official Race Website


Ever run in the Summit Rock Half Marathon? Share your impressions here, or post your review in the Comments below.

See more races in: December, California