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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • Ultramarathon
  • 160.9 km
  • Big Timber
  • Event dates –
  • Past event

Crazy Mountain 100 Ultramarathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2026 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

View verified GPS mapOfficial event website ↗
Data current as of

Decision summary

Crazy Mountain 100 Ultramarathon at a glance

Cut-off average pace
13:25/km

36:00:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.

Typical conditions
51/100

Historical race-date favourability, not a forecast

Evidence depth
43 verified facts

Stored GPS route

Quick answers

What runners ask first

Crazy Mountain 100 Ultramarathon route map

raceindex.org has a GPS course file for Crazy Mountain 100 Ultramarathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.

How hilly is the Crazy Mountain 100 Ultramarathon?

The Crazy Mountain 100 Ultramarathon is described as mountainous. The course listing puts the climb at 7,010 m.

Where does the Crazy Mountain 100 Ultramarathon route go?

The Crazy Mountain 100 Ultramarathon route starts at Westling Ranch near Wilsall, Montana; start 6:00 AM Friday, July 24, 2026 and finishes at Berg Ranch near Lennep / Martinsdale, Montana; finish line closes 6:00 PM Saturday, July 25, 2026. Underfoot, expect primarily single track with sections of forest road and two-track; steep backcountry terrain with scree fields and stretches where runners follow cairns and ridgelines. It passes Crazy Mountain Range, Conical Pass, Halfmoon Aid Station, Porcupine and Ibex. All entrants must complete 8 hours of volunteer or trail work within one year of the race.

What should runners know on race day for the Crazy Mountain 100 Ultramarathon?

10. Pacers permitted from the Halfmoon Aid Station onward (with earlier-start exceptions for runners aged 60+ and those with disabilities); pacers must sign a waiver, wear a pacer bib, and check in and out at aid stations.

Race character

Scenery

  • Mountain
  • Forest
  • Coastal
  • Lakeside
  • Countryside

Atmosphere

  • Wilderness
  • Scenic Tour

Terrain

  • Trail
  • Mixed
Elevation character
Mountainous
Technicality
Very Technical
Source-stated ascent
7,010 m

Entry, logistics and records

Records and field

Field size
Entry capped at 200 runners; the race sells out quickly.
Field cap
200

Entry requirements

Entry status
Past event: The listed edition date has passed.
Cut-off
36-hour overall cutoff; runners must average roughly 21.6-minute miles including aid-station time and must be checked OUT of each checkpoint by its cutoff.
Qualification status
Lottery ultra requiring a qualifying race: a trail ultra of at least 50 miles with 6,500 ft of vertical gain (50 Miler under 16 hours) completed within 2 years; cannot be the runner's first ultra, and road races / fat Ass courses are excluded. From 2027 the standard rises to a 100K with 10,000 ft gain (under 20 hours) or a 100 Miler with 15,000 ft gain (or Copper Kings 100) under 34 hours. Finishing also qualifies runners for the Hardrock 100 and Western States 100 lotteries.
Prior experience
Must complete a qualifying trail ultra (50-mile minimum with 6,500 ft gain, finished under 16 hours) within 2 years of race start; cannot be your first ultra

Race day logistics

Aid stations
10
Pacers
Pacers permitted from the Halfmoon Aid Station onward (with earlier-start exceptions for runners aged 60+ and those with disabilities); pacers must sign a waiver, wear a pacer bib, and check in and out at aid stations.

Access and course status

Start
Westling Ranch near Wilsall, Montana; start 6:00 AM Friday, July 24, 2026.
Finish
Berg Ranch near Lennep / Martinsdale, Montana; finish line closes 6:00 PM Saturday, July 25, 2026.

Course facts

Course type
Point To Point
Surface
Primarily single track with sections of forest road and two Track; steep backcountry terrain with scree fields and stretches where runners follow cairns and ridgelines.
Landmarks
Crazy Mountain Range, Conical Pass, Halfmoon Aid Station, Porcupine, Ibex, Cow Camp, Sunlight, Crandall, Forest Lake, Huntin Camp, Westling Ranch, Berg Ranch
Notable features
  • All entrants must complete 8 hours of volunteer or trail work within one year of the race. Veterans and active US military receive a 10% discount with military ID verification before registration opens. Live runner tracking is provided via TrackLeaders, and a race-issued GPS device is mandatory
  • High-alpine wilderness route featuring jagged cliffs, scree fields and high alpine lakes
  • described by organisers as terrain you 'won't be able to cheat.' Mandatory gear includes a collapsible cup, hydration pack, headlamp/waist light, waterproof rain jacket, emergency blanket, a provided GPS device and personal first-aid items

What are typical race-day conditions?

  • 23°CTypical temperature
  • 18 kphTypical wind
  • 0 mmTypical rainfall
  • 51Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (2)

Read the full methodology →