Mt. Umunhum Ultras

JUN
12
2027
Trail ultras at Almaden-Quicksilver County Park on June 12, 2027, offering 100K, 50M, 50K, marathon and 30K with marked courses, aid stations, drop bags and pacer support.
Sat 12 Jun 2027
100 kilometers 50 miles 50 kilometers 26 miles 30 kilometers

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Mt Umunhum Ultras : Almaden-Quicksilver County Park

The event on Saturday, June 12, 2027 takes place at Almaden-Quicksilver County Park, Mockingbird Hill Entrance, 19535 Mockingbird Hill Lane, San Jose, CA. It offers multiple trail distances and uses marked ribbons on the course to guide runners. Pink ribbons tied to clothespins mark primary route segments and orange ribbons mark certain climbs and aid station approaches.

Distances

  • 100K
  • 50 miles
  • 50K
  • Trail marathon (26 miles)
  • 30K

Course formats include out-and-back sections and repeat laps for longer distances. Specific turnarounds are designated at aid stations and trail intersections (for example, 50K and 50M turnarounds and a 30K turnaround at the Woods parking lot). Time limits apply by distance: a 20-hour limit for the longest events and a 10-hour limit for the shorter ultras.

Aid stations are placed at multiple mileages, remain open until the last runner, and provide water stops. Drop bags are collected race morning, delivered to requested aid stations, and returned when possible; bags are labeled with the aid station name. Lights are required when on dark sections of trail and may be left at aid stations for later use. Pacer rules include one pacer at a time, no muling, and specific pacer pickup points for the 100K. Visit the organization's website for the most recent information.

Events nearby

Map-based trail scramble in Harvey West Park on Nov 14, 2026 where teams of 1 to 5 collect points in 2 hour or 4 hour formats.
Trail races from a kids run to a 50K at Calero County Park in San Jose with varied single track, multiple aid stations, free parking, and drop bag support for the 50K.
Trail races at Sanborn Regional Park on December 12, 2026: 5K, 10K and half marathon through redwoods with chip timing and finisher medals.
Multi-distance trail event at Almaden Quicksilver County Park on January 2, 2027, with dirt-road courses, aid stations, drop-bag service, and published time cutoffs.
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