Aspen Backcountry Marathon

Aspen, CO, USA · July 31, 2027·
partly-cloudy-day53°→ 70° finish·Light·Dry
8
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Race Day Weather

partly-cloudy-day
53°at start
70° at finish
Light
Dry
Your goal
0:00:00

Cool start, warm finish ahead

Runners will face a cool start at 53°F in the high elevation, warming to 70°F by the finish. With light winds from the west, runners can expect a mix of tailwinds and crosswinds throughout the course. It will be crucial to pace conservatively early to adapt to the rising temperatures, especially during the significant climb from miles 3 to 8.

This course climbs 2,208 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 53° and finish around 11:25 AM in 70°.

Race day forecast available in 257 days
Along your raceStart line only
partly-cloudy-night10
partly-cloudy-night10
partly-cloudy-day10
Start
partly-cloudy-day9
mi 3
partly-cloudy-day8
mi 10
partly-cloudy-day7
mi 17
partly-cloudy-day6
Finish
partly-cloudy-day5
partly-cloudy-day5
partly-cloudy-day5
partly-cloudy-day5
partly-cloudy-day6

Pace Calculator

26.2mi
0:00:00
HH:MM:SS
Pace
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Enter a finish time to see what race day does to it.

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Race Plan

Get your personalized Aspen Backcountry 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.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

Race weekend

Saturday, July 31
6:00 AM50K (31.1 mi)
7:30 AMMarathon (26.2 mi)
8:00 AMHeavy Half Marathon (13.1 mi)

FAQ

When is the 2027 Aspen Backcountry Marathon?

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

What will the weather be like for the 2027 Aspen Backcountry Marathon?

The forecast calls for a high of 72°F and a low of 48°F with a 11% chance of rain.

Historical Weather

Based on 6 years of data
Avg Temp
62°F
L:53° H:71°
RunScore
7
Conditions
Rain Freq
33%
2 of 6 yrs
Wind5mph
Dew43°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
clear-day
55°/79°-
7
2025
partly-cloudy-day
54°/73°Light
7
2023
partly-cloudy-day
48°/69°-
8
2022
partly-cloudy-day
50°/73°-
7
2019
partly-cloudy-day
62°/63°Light
7
2011
clear-day
48°/71°-
8