Diablo Trail Marathon
Race Day Weather
Cool start, warming trend ahead
Runners will face a temperature rise from 53°F at the start to 73°F by the finish, with a mild wind from the WSW at 8 mph. Humidity is moderate at 46% with a dew point of 43°F. As temperatures climb, pacing adjustments may be necessary to maintain energy levels.
This course climbs 3,182 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 56° and finish around 11:55 AM in 67°.
Pace Calculator
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Get your personalized Diablo Trail Marathon race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
