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

Seeley Lake, MT, USA • July 18, 2026
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Race Day Weather

clear-day
60°
84° high
Breezy
Dry

Warm day, stay hydrated

Runners will face a temperature increase from 64°F at the start to 84°F by the finish. With a breeze from the SW at 12 mph, hydration will be crucial as humidity remains low at 31%. It’s advisable to adjust pacing strategies to conserve energy during the warmer hours.

Race day forecast available in 113 days
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Area Map

Course Map

Course Map Unavailable

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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.

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

Clear conditions throughout the day.

2024
clear-day
53°/82°-
8

2023 Bob Marshall Trail Half Marathon, 50K, and 10K

Clear conditions throughout the day.

2023
clear-day
66°/91°-
6
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