Autumn Run

Buena Vista, CO, USA · September 19, 2026
partly-cloudy-day52°·59° high·Light·Dry
9
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Race Day Weather

partly-cloudy-day
52°at start
63° high
Breezy
Dry

Cool start, steady conditions ahead

Runners will face a cool start at 43°F, gradually warming to 66°F. Wind will be a moderate 17 mph from the ESE, providing a slight headwind throughout. With a low humidity of 37%, hydration strategies should remain consistent, but runners can maintain their pace without concerns about heat or rain.

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Pace Calculator

Distance: 13.1mi
0:00:00
HH:MM:SS
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Race Info

The Autumn Run takes place on the third Saturday of September in Buena Vista, Colorado, in the upper Arkansas River Valley below the Collegiate Peaks. The half marathon starts near Cottonwood Lake and finishes at McPhelemy Park. A 10K, 5K, and free kids' fun run share the same race weekend. Source

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Course Map

Course Map Unavailable

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FAQ

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When is the 2026 Autumn Run?

The 2026 Autumn Run will be held on Saturday September 19, 2026.

Is the Autumn Run a Boston Marathon Qualifier?

No, the Autumn Run is NOT a Boston Marathon qualifier.

What is the time limit for the Autumn Run?

The time limit for the Autumn Run is 2:00 PM hours.

What will the weather be like for the 2026 Autumn Run?

The forecast calls for a high of 64°F and a low of 42°F with a 34% chance of rain.

Historical Weather

Based on 8 years of data
Avg Temp
62°F
L:57° H:62°
RunScore
8
Conditions
Rain Freq
0%
0 of 8 yrs
Wind9mph
Dew27°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults

2025 Autumn Run

Partly cloudy throughout the day with afternoon rain.

2025
partly-cloudy-day
55°/60°-
9

2024 Autumn Run

Becoming cloudy in the afternoon with late afternoon rain.

2024
clear-day
62°/65°-
8

2023 Autumn Run

Clear conditions throughout the day.

2023
clear-day
50°/53°-
8

2022 Autumn Run

Partly cloudy throughout the day.

2022
partly-cloudy-day
58°/64°-
9

2019 Autumn Run

Clear conditions throughout the day.

2019
clear-day
57°/62°-
8

2018 Autumn Run

Clear conditions throughout the day.

2018
clear-day
66°/71°-
9

2017 Autumn Run

Partly cloudy throughout the day.

2017
partly-cloudy-day
55°/60°-
8

2016 Autumn Run

Clear conditions throughout the day.

2016
clear-day
53°/59°-
9

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