Trail
100 mile
161 km
Start: Jul 26, 02:00 AM
Waitlist Price: 0.00 USD
CrazyMountain100
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Trail in United States, Wilsall / Lennep
Distances
About
A 100-mile ultramarathon through the iconic Crazy Mountain Range in Montana, featuring extreme terrain, 23,000 ft of elevation gain, and a 36-hour cutoff. The race traverses public, private, and Indigenous lands with support from two family-owned cattle ranches at the start and finish.
Catering & aid stations
On-course aid stations provide food and drink. Specific menu details are available at each aid station; options include hydration, electrolytes, and solid food items during the race.
Pacers
Pacer support is available at designated stations. Target times per start wave align with race briefing on race day; pacers are identified by flags and must follow declared pacelisting rules.
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Typical weather in Wilsall / Lennep
Monthly averages based on historical data (2000–present).
Jan28°13°
↑ 08:01
↓ 17:03
Feb28°12°
↑ 07:27
↓ 17:48
Mar38°21°
↑ 07:35
↓ 19:29
Apr46°27°
↑ 06:36
↓ 20:10
May57°36°
↑ 05:50
↓ 20:49
Jun67°45°
↑ 05:32
↓ 21:16
Jul79°54°
↑ 05:47
↓ 21:11
Aug77°53°
↑ 06:23
↓ 20:32
Sep68°45°
↑ 07:02
↓ 19:35
Oct51°32°
↑ 07:41
↓ 18:37
Nov37°20°
↑ 07:25
↓ 16:51
Dec28°12°
↑ 07:59
↓ 16:38
Prices & signup
- 100 mile0.00 USD
FAQ
What is the race date for CrazyMountain100?
July 24th-25th, 2026.
Where is the start and finish?
Start: Westling Ranch, Wilsall, MT. Finish: Berg Ranch, Lennep, MT.
What is the distance and elevation gain?
100 miles with approximately 23,000 ft of vertical gain.
Is there a qualifier requirement?
Yes, you must submit a qualifying ultra performed within the last two years.
Are support dogs allowed at the start line?
All dogs must remain on leash at all times at the start line.
Last updated: Jun 5, 2026, 11:56:43 PM
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