The 2026 Montana Half Marathon has concluded.Share your finish

Montana Half Marathon

Race complete
Billings, MT, USA · September 20, 2026·
rain52°·54° high·Breezy·Light rain
9
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Race Day Weather

rain
52°at start
60° high
Windy
Light rain
Your goal
0:00:00

Comfortable temps, moderate wind, rain likely

Mild 52°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 60°F through the course will gradually increase perceived effort in the second half. Moderate winds around 16mph may affect pacing on open sections of the course. Rain is likely — waterproof your phone and bib, and consider a disposable poncho for the corral. High humidity (92%) will make it harder to cool down through sweat — increase fluid intake accordingly.

rain10
rain10
cloudy10
rain9
rain8
rain8
rain7
partly-cloudy-day7
partly-cloudy-day6
partly-cloudy-day6

Pace Calculator

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Race Plan

Get your personalized Montana 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

Race Info

The Montana Marathon half marathon is a point-to-point race that starts on Shorey Road outside Billings and finishes at Pioneer Park in downtown Billings. It shares the finish with the full marathon and follows the same gradual descent from the plains toward the Yellowstone River valley. The race is run on the Sunday of race weekend, and runners are bused to the start from the Senior High School parking lot.

Race weekend

Sunday, September 20
7:00 AMMarathon (26.2 mi)
8:00 AMHalf Marathon (13.1 mi)
9:15 AM10K (6.2 mi)
9:30 AM5K (3.1 mi)

FAQ

When is the 2026 Montana Half Marathon?

The 2026 Montana Half Marathon will be held on Sunday September 20, 2026.

What is the time limit for the Montana Half Marathon?

The time limit for the Montana Half Marathon is 5.5 hours.

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

The forecast calls for a high of 62°F and a low of 52°F with a 100% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

Historical Weather

Based on 13 years of data
Avg Temp
57°F
L:54° H:60°
RunScore
8
Conditions
Rain Freq
8%
1 of 13 yrs
Wind9mph
Dew41°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
52°/54°Light
9
2025
partly-cloudy-day
71°/78°-
5
2024
partly-cloudy-day
49°/51°-
10
2023
partly-cloudy-day
57°/66°-
7
2022
partly-cloudy-day
39°/47°-
9
2021
partly-cloudy-day
58°/59°-
10
2020
partly-cloudy-day
54°/62°-
9
2019
partly-cloudy-day
65°/72°-
6
2018
clear-day
53°/59°-
8
2017
partly-cloudy-day
40°/46°-
10
2016
partly-cloudy-day
63°/71°-
7
2015
partly-cloudy-day
54°/64°-
9
2014
clear-day
51°/55°-
10