Run Rabbit Run 100 took place on Fri, Sep 18, 2026 in Steamboat Springs, United States. The main route is 163.3 km.
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- Date
- Fri, Sep 18, 2026
- Start
- Steamboat Springs 🇺🇸
- Distance
- 163.3 km
- Climbing
- 6,215 m
- Level
- Open to all
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Start freeRun Rabbit Run 100 is a challenging high-country ultramarathon around Steamboat Springs featuring separate Hare and Tortoise starts and a substantial prize purse.
What this race demands
Run Rabbit Run 100 demands sustained endurance across 163.3 km of mountain terrain with 6215 meters of climbing. Athletes must manage high-altitude exertion and extreme cumulative vertical gain over a protracted duration.
Extreme climbing volume
Navigating 6215 meters of elevation gain across 163.3 km requires significant uphill strength, efficient pacing on ascents, and the muscular endurance to handle relentless descending.
Ultra-distance durability
Covering 163.3 km places severe stress on connective tissues and energy systems, demanding meticulous pacing and advanced fatigue resistance to sustain forward motion for an extended period.
High-altitude management
As a high-country ultramarathon in Steamboat Springs, the course exposes athletes to reduced oxygen availability, requiring careful management of aerobic output to prevent premature bonking.
Given the substantial duration of a 163.3 km mountain ultramarathon, athletes should target 60 to 90 grams of carbohydrates per hour from the early stages to sustain energy levels and prevent profound glycogen depletion.
Estimated finish times
Estimates by level, not promises. Your own number depends on your fitness on the day.
Frequently asked questions
When is Run Rabbit Run 100?
Run Rabbit Run 100 took place on Fri, Sep 18, 2026 in Steamboat Springs, United States.
How long is Run Rabbit Run 100?
The main route is 163.3 km.
What does Run Rabbit Run 100 demand?
Run Rabbit Run 100 demands sustained endurance across 163.3 km of mountain terrain with 6215 meters of climbing. Athletes must manage high-altitude exertion and extreme cumulative vertical gain over a protracted duration.
How much climbing does Run Rabbit Run 100 have?
Run Rabbit Run 100 has 6,215 m of climbing.
Who is Run Rabbit Run 100 for?
Run Rabbit Run 100 is open to all participants.
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