Race Day Weather
Comfortable temps, mild wind
Runners will face a temperature rise from 53°F at the start to a peak of 73°F. Winds will be light at 8 mph from the SSW, with occasional gusts up to 22 mph. With lower humidity at 39%, hydration should be moderate, but runners may want to adjust their pace as temperatures climb. Starting conservatively can help manage the heat later in the race.
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The Mt. Sneffels Marathon offers runners a challenging and scenic journey through Colorado's San Juan Mountains. The course features a mix of gravel and packed dirt roads, with an elevation gain of approximately 1,500 feet, providing a true test of endurance. Participants are treated to breathtaking views of Mount Sneffels and the surrounding peaks, making it a memorable experience for all. Source
Historical Weather
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 | | 53°/68° | - | 43° | |
2024 |  | 54°/74° | - | 36° | |
2023 | | 54°/78° | - | 36° | |
2022 | | 53°/65° | - | 47° | |
2021 |  | 45°/66° | - | 41° | |
2019 | | 56°/76° | - | 25° | |
2018 | | 52°/78° | - | 31° | |
2017 | | 47°/78° | - | 44° | |
2016 | | 50°/73° | - | 27° | |
2015 | | 51°/66° | - | 48° | |
2014 | | 50°/77° | - | 33° | |
2013 | | 51°/68° | Light | 40° | |
2012 | | 57°/76° | - | 42° | |
2011 | | 54°/80° | - | 29° | |
2010 | | 55°/64° | - | 41° | |
2009 | | 55°/65° | Light | 56° | |
2007 | | 53°/77° | - | 32° | |
2005 | | 52°/71° | - | 46° |