The 2026 Aspen Backcountry Marathon has concluded.
Aspen Backcountry Marathon
Race complete
Aspen, CO, USA · August 1, 2026
Race Day Weather
55°at start
87° high
Windy
Dry
Warm afternoon, adjust pace accordingly
Runners will face a starting temperature of 51°F, rising to a warm 87°F by the finish. Winds will be from the S at 16 mph, providing a moderate headwind throughout. With humidity at 28%, it's crucial for runners to pace conservatively in the early miles and hydrate frequently to manage the heat later in the race.
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Historical Weather
Based on 3 years of data
Avg Temp
65°F
L:51° H:75°
RunScore
Conditions
Rain Freq
33%
1 of 3 yrs
Wind6mph
Dew42°F
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 |  | 54°/77° | Light | 41° | |
2023 | | 48°/74° | - | 40° | |
2022 | | 50°/74° | - | 45° |
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