Mild 58°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 74°F by later miles, so expect fading conditions as the race progresses. Moderate winds around 18mph may affect pacing on open sections of the course.

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Distance: 13.1mi

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Race Info

The Beaverhead Half Marathon is a 13.1-mile loop that starts and finishes in downtown Dillon, Montana, held on the Saturday of race weekend. The course is entirely on pavement, running through the streets of town and out into agricultural land. Runners get views of the Pioneer, Blacktail, Sweetwater, Highland and Tobacco Root mountain ranges at an elevation of about 5,240 feet.

Website

Race weekend

Saturday, May 23

9:00 AMMarathon (26.2 mi)

10:00 AMHalf Marathon (13.1 mi)

FAQ

When is the 2026 Beaverhead Half Marathon?

The 2026 Beaverhead Half Marathon will be held on Saturday May 23, 2026.

What is the time limit for the Beaverhead Half Marathon?

The time limit for the Beaverhead Half Marathon is 5 hours.

What will the weather be like for the 2026 Beaverhead Half Marathon?

The forecast calls for a high of 74°F and a low of 41°F with a 0% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

Historical Weather

Based on 8 years of data

Avg Temp

53°F

L:50° H:55°

RunScore

Conditions

Rain Freq

0 of 8 yrs

Wind9mph

Dew35°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Beaverhead Half Marathon Clearing in the afternoon. 2026	58°/64°	-	32°
2025 Beaverhead Half Marathon Clear conditions throughout the day. 2025	50°/58°	-	38°
2024 Beaverhead Half Marathon Clear conditions throughout the day. 2024	54°/64°	-	32°
2023 Beaverhead Half Marathon Partly cloudy throughout the day. 2023	50°/56°	-	40°
2022 Beaverhead Half Marathon Partly cloudy throughout the day. 2022	50°/53°	-	30°
2021 Beaverhead Half Marathon Clearing in the afternoon with morning rain. 2021	53°/59°	-	38°
2019 Beaverhead Half Marathon Partly cloudy throughout the day with rain clearing later. 2019	41°/43°	-	39°
2018 Beaverhead Half Marathon Partly cloudy throughout the day with early morning rain. 2018	43°/45°	-	35°

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