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 start, warming through the race

A warm 71°F start means heat management is critical — consider dialing back your goal pace by 10-20 sec/mi. Temperatures rising to 85°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 52 days
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We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

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