Aspen Backcountry Heavy Half Marathon

Aspen, CO, USA · July 31, 2027·
partly-cloudy-day56°·66° high·Calm·Dry
7
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Aspen Backcountry Heavy Half Marathon race day weather

partly-cloudy-day
56°at start
71° high
Light
Dry
Your goal
0:00:00

Comfortable temps, big temp swing, chance of rain

Mild 56°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 71°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing. There's a chance of rain, so have a backup gear plan ready.

Race day forecast available in 251 days
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Pace Calculator

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Race Plan

Get your personalized Aspen Backcountry Heavy Half 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

About the Aspen Backcountry Heavy Half Marathon

The Aspen Backcountry Heavy Half Marathon starts and finishes at Rio Grande Park in Aspen on the Saturday of race weekend. It climbs out of town on dirt trails past Henry Stein Park, Hummingbird and Smugglers, running longer than a standard half marathon with steep ascents and descents. The course begins at about 7,900 feet and peaks above 10,100 feet, so it is a high alpine trail run with views of the Elk Mountains and Aspen below.

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)

Aspen Backcountry Heavy Half Marathon FAQ

When is the 2027 Aspen Backcountry Heavy Half Marathon?

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

What is the time limit for the Aspen Backcountry Heavy Half Marathon?

The time limit for the Aspen Backcountry Heavy Half Marathon is 8 hours.

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

The forecast calls for a high of 72°F and a low of 48°F with a 11% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

What is the weather usually like for the Aspen Backcountry Heavy Half Marathon?

Over the 6 years racecast.io has race-day weather for (2011 to 2026), it averaged 58°F at the start and 67°F by a typical finish. Rain fell during race hours in 2 of those years (2019 and 2025).

What was the hottest Aspen Backcountry Heavy Half Marathon?

Of the 6 years on record, 2026 was the warmest, reaching 76°F during race hours. The coldest start was 2023, at 52°F.

What was the windiest Aspen Backcountry Heavy Half Marathon?

Of the 6 years on record, 2025 was the windiest, with wind averaging 12 mph during race hours. The calmest was 2022, at 2 mph.

Aspen Backcountry Heavy Half Marathon weather history

Based on 6 years of data
Avg Temp
62°F
L:57° H:67°
RunScore
7
Conditions
Rain Freq
33%
2 of 6 yrs
Wind4mph
Dew43°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
clear-day
62°/76°-
7
2025
cloudy
58°/67°Light
7
2023
partly-cloudy-day
52°/65°-
8
2022
partly-cloudy-day
57°/67°-
7
2019
cloudy
62°/63°Light
7
2011
clear-day
53°/66°-
8