Mt. Umunhum Trail Marathon
Race Day Weather
Cool start — fast day potential, warming through the race
A cool 46°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 58°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing.
This course climbs 2,881 ft to its high point and back, so we look at it at 2 points, not just the start line. In a typical year, at 9:00/mi, you start at 46° and finish around 11:56 AM in 58°.
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Race Info
The Mt. Umunhum Trail Conquest Winter marathon starts at the Hacienda entrance to Almaden Quicksilver County Park in San Jose, California, and climbs into the Sierra Azul Open Space Preserve to the summit of Mt. Umunhum. Troy's California Trail Runs holds the race each February, with a companion Fall edition on the same course network held in October. The event also offers 50K, 30K, half marathon, 7-mile, 5K, and 1-mile distances on the same day, with the 30K route instead summiting Bald Mountain.
