Bob Marshall Trail Half Marathon, 50K, and 10K

Seeley Lake, MT, USA · July 18, 2026
partly-cloudy-day71°·85° high·Breezy·Dry
8
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Race Day Weather

partly-cloudy-day
71°at start
85° high
Breezy
Dry

Warm day, adjust pace accordingly

Runners will face a temperature rise from 61°F at the start to a peak of 85°F. With a light SW wind at 8 mph and low humidity at 30%, hydration will be key. It's advisable to start conservatively and adjust pace as the heat increases throughout the race.

Race day forecast available in 41 days
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Race Info

Area Map

Course Map

FAQ

When is the 2026 Bob Marshall Trail Half Marathon, 50K, and 10K?

The 2026 Bob Marshall Trail Half Marathon, 50K, and 10K will be held on Saturday July 18, 2026.

What is the time limit for the Bob Marshall Trail Half Marathon, 50K, and 10K?

The time limit for the Bob Marshall Trail Half Marathon, 50K, and 10K is 9 hours.

What will the weather be like for the 2026 Bob Marshall Trail Half Marathon, 50K, and 10K?

The forecast calls for a high of 86°F and a low of 55°F with a 2% chance of rain.

Historical Weather

Based on 2 years of data
Avg Temp
86°F
L:60° H:87°
RunScore
6
Conditions
Rain Freq
0%
0 of 2 yrs
Wind12mph
Dew40°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2024
clear-day
53°/82°-
8
2023
clear-day
66°/91°-
6