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Aspen Backcountry Marathon

Aspen, CO, USA

Partly cloudy throughout the day.

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Details
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Light Rain
30%
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6
Light Rain
50%
Pre-Race
Race
Post-Race
350 lumens of light to illuminate the trail ahead. Black Diamond Spot 350 Headlamp.
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Wanna to know when the weather changes? .

News

August 2, 2023
Upcoming marathons and other races happening this weekend.

FAQ

When is the 2027 Aspen Backcountry Marathon?

The 2027 Aspen Backcountry Marathon will be held on Saturday July 31, 2027.

Aspen Backcountry Marathon Course Map

Loading Course Map...

Aspen Backcountry Marathon Weather History

Aspen Backcountry Marathon Weather Averages

Average Temp: 65°, Average Low: 50°, Average High: 80°
Time8AM9AM10AM11AM12PM1PM2PM
Temp
58°
62°
67°
71°
73°
75°
76°
Feel58°62°67°71°72°74°75°
Rain-------
Wind4mph
5mph
4mph
7mph
5mph
10mph
8mph
Dew42°44°43°43°41°38°38°
RunScoreRun Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 7Run Score: 8

Aspen Backcountry Marathon 2026

Aug 1, 2026
Clear conditions throughout the day.
Low: 51°, High: 90°
Time8AM9AM10AM11AM12PM1PM2PM
Temp
clear-day 62°
clear-day 68°
clear-day 76°
clear-day 79°
clear-day 84°
clear-day 85°
clear-day 87°
Feel62°68°76°79°81°82°84°
Rain-------
Wind0mph
3mph
3mph
7mph
0mph
16mph
13mph
Dew37°37°34°35°29°27°25°
RunScoreRun Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 7Run Score: 6Run Score: 7

Aspen Backcountry Marathon 2025

Aug 2, 2025
Partly cloudy throughout the day with morning rain.
Low: 48°, High: 77°, Light Rain
Time8AM9AM10AM11AM12PM1PM2PM
Temp
cloudy 60°
rain 58°
partly-cloudy-day 67°
clear-day 73°
partly-cloudy-day 75°
partly-cloudy-day 77°
partly-cloudy-day 72°
Feel60°58°67°73°75°77°72°
Rain-light-----
Wind11mph
11mph
13mph
10mph
10mph
15mph
9mph
Dew40°46°45°41°41°33°41°
RunScoreRun Score: 8Run Score: 6Run Score: 8Run Score: 8Run Score: 8Run Score: 7Run Score: 8

Aspen Backcountry Marathon 2023

Aug 5, 2023
Partly cloudy throughout the day.
Low: 48°, High: 79°
Time8AM9AM10AM11AM12PM1PM2PM
Temp
partly-cloudy-day 52°
partly-cloudy-day 60°
clear-day 65°
clear-day 69°
partly-cloudy-day 70°
clear-day 74°
clear-day 75°
Feel52°60°65°69°70°74°75°
Rain-------
Wind3mph
0mph
6mph
5mph
6mph
9mph
9mph
Dew41°41°40°41°38°40°39°
RunScoreRun Score: 9Run Score: 8Run Score: 9Run Score: 8Run Score: 8Run Score: 8Run Score: 8

Aspen Backcountry Marathon 2022

Jul 30, 2022
Partly cloudy throughout the day with rain.
Low: 48°, High: 77°, Moderate Rain
Time8AM9AM10AM11AM12PM1PM2PM
Temp
partly-cloudy-day 57°
clear-day 63°
clear-day 67°
clear-day 73°
partly-cloudy-day 73°
clear-day 74°
clear-day 77°
Feel57°63°67°73°73°74°77°
Rain-------
Wind0mph
6mph
0mph
10mph
5mph
0mph
5mph
Dew45°46°44°47°46°44°45°
RunScoreRun Score: 8Run Score: 9Run Score: 8Run Score: 8Run Score: 8Run Score: 7Run Score: 8

Aspen Backcountry Marathon 2019

Aug 11, 2019
Partly cloudy throughout the day with rain in the morning and afternoon.
Low: 57°, High: 73°, Moderate Rain
Time8AM9AM10AM11AM12PM1PM2PM
Temp
cloudy 63°
cloudy 62°
rain 62°
cloudy 62°
rain 57°
rain 59°
partly-cloudy-day 61°
Feel63°62°62°62°57°59°61°
Rain--lightlightlightlight-
Wind7mph
8mph
0mph
6mph
4mph
11mph
10mph
Dew46°49°48°51°52°51°51°
RunScoreRun Score: 9Run Score: 9Run Score: 6Run Score: 9Run Score: 6Run Score: 5Run Score: 8

Aspen Backcountry Marathon 2011

Aug 20, 2011
Partly cloudy throughout the day.
Low: 46°, High: 82°, Light Rain
Time8AM9AM10AM11AM12PM1PM2PM
Temp
clear-day 53°
clear-day 61°
partly-cloudy-day 66°
clear-day 71°
clear-day 77°
clear-day 80°
clear-day 82°
Feel53°61°66°71°77°79°80°
Rain-------
Wind3mph
0mph
3mph
3mph
5mph
9mph
0mph
Dew43°45°45°45°41°30°29°
RunScoreRun Score: 9Run Score: 8Run Score: 9Run Score: 8Run Score: 8Run Score: 8Run Score: 7