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Built on bad decisions in Boulder, CO.

Run Rabbit Run 100 - Hares

Basic Listing
  1. 2026 Edition

The competitive division of Run Rabbit Run 100 — a 1:00 pm start, thirty hours, and the biggest prize purse in trail ultrarunning.

Explore the Course
Interactive map with aid stations, elevation & weather
DirectionsExplore
Registration OpensNovember 16, 2025
DeadlineSeptember 15, 2026
Register

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Course map for Run Rabbit Run 100 - Tortoises

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100 Mile
Steamboat Springs, CO, US
Sep 18, 2026
101.8 miles
20,390 ft gain
Loop
Crew
Pacers
Dropbags
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All trail races in Colorado→
September 18, 2026
Friday 1:00pm MDT start
Steamboat Springs, CO
United States
101.8 miles
Loop Course
20,390 ft
Elevation Gain
Open Registration
No lottery
No Service Requirement
Does not require trail or volunteer work
No Qualifier
No qualifier race required
Challenging
Some ultra experience recommended
Fills Up Fast
High demand — register as soon as possible
Links
WebsiteInstagramFacebook
2012
Established
350
Field Size
63%
Finish Rate

What Makes It Great

The Hare division is Run Rabbit Run's race for the podium. Hares start at 1:00 pm on Friday, four hours after the Tortoises, and share the same 100-mile loop above Steamboat Springs — but they run it to a tighter deadline: 7:00 pm Saturday, thirty hours.

Hares run for prize money, paid seven deep when the field is large enough, with a masters premium, a team championship, and a $1,000 preem for the first runner to reach the top of the gondola. Tortoises run the same course for awards.

The trade for the money is a stricter race. Hares get no pacer except through town between Spring Creek Trailhead and Olympian Hall, in both directions, and again over the last few miles from the gondola. Crew may help only at designated crew aid stations, at the gondola top, and through town. You may switch between Hare and Tortoise until 7 September 2026.

Difficulty

Intermediate
5/10

Some ultra experience recommended

Technical Terrain
Steep Climbing
Technical Descent
High Altitude
Night Running
Variable Weather

Race Highlights

Highest prize purse in trail ultrarunning
Offers the largest cash prize of any trail ultra worldwide, drawing elite fields alongside first-time hundred-milers
Overnight passage through downtown Steamboat
Runners cross Lincoln Avenue and weave through town in the dark, cheered by locals along the Spring Creek Trail
The Lane of Pain loop
A relentless out-and-back climb up Emerald Mountain hits runners in both directions at the race's halfway point
Two alpine Summit Lake crossings
The course visits Summit Lake (10,316 ft) twice — outbound via the Continental Divide and inbound via the Grouse Trail
Hares vs. Tortoises format
Competitive Hares start 4 hours after Tortoises and race to a tighter cutoff, sharing the course but competing in separate divisions

Finish Awards

Finisher Buckle
All 100-mile finishers receive a buckle; higher-quality buckles are awarded for faster finishing times.
Finisher Beer Mug
All finishers receive a commemorative beer mug for the post-race party at the finish area.
Free Entry (Masters)
Women aged 50+ and men aged 60+ who officially finish earn complimentary entry to the following year's race.

Run Rabbit Run 100 - Hares

Steamboat Springs, CO, United StatesSeptember 18, 2026

September 18, 2026

Run Rabbit Run 100 - Hares is a loop trail race in Steamboat Springs, CO, United States, held on September 18, 2026. The course covers 101.8 miles, climbs 20,390 ft, and has a 30h cutoff.

Course map for Run Rabbit Run 100 - Hares
DistDistance101.8 mi
GainElevation Gain20,390 ft
LimitCutoff30 h
Terrain Technical Terrain
Steep ClimbingTechnical DescentHigh AltitudeNight RunningVariable Weather

Entry Timeline

Registration OpensNovember 16, 2025
Registration DeadlineSeptember 15, 2026
Race DaySeptember 18, 2026

Lottery

This event uses open registration - no lottery entry required.

Qualifier

This event does not require a qualifier for entry.

Service Requirement

This race does not have a service requirement for entry.

Terrain

Technical Difficulty7/10

Challenging terrain with rocks, roots, and steep grades

101.8 mi
Distance
Loop
Route
30h
Cutoff Time
8,986 ft
Average Elevation
20,390 ft
Total Ascent
20,390 ft
Total Descent
10,591 ft
High Point
6,699 ft
Low Point
Explore Course
Course map for Run Rabbit Run 100 - Hares
Launch Course Explorer

Course Preview

Run Rabbit Run 100 — Full Course Flyover | 101.8 mi, 16,490 ft | Steamboat Springs, CO
Trailrace

Course preview video for Run Rabbit Run 100 - Hares. The course covers 101.8 miles.

Aid Stations & Cutoffs

LocationMileElevationCutoffCrewPacersDrop bags
Start
Start
0.06,969 ft—
Crew
Drop Bags
Mt Werner
Aid Station
5.410,299 ft
2h30m3:30 PM
Fish Creek Falls
Aid Station
17.76,952 ft
5h6:00 PM
CrewHike in
Long Lake
Aid Station
24.39,865 ft—
Summit Lake (via Continental Divide)
Aid Station
30.110,423 ft—
Crew
Drop Bags
Billy's Rabbit Hole
Aid Station
34.310,092 ft—
Dry Lake (via Flash of Gold)
Aid Station
44.58,196 ft—
Crew
Olympian Hall
Aid Station
51.26,703 ft
13h30m2:30 AM +1
Crew
Drop Bags
Lane of Pain
Aid Station
54.48,061 ft—
Lane of Pain
Aid Station
58.18,182 ft—
Olympian Hall
Aid Station
63.96,667 ft
18h45m7:45 AM +1
Crew
Drop Bags
Dry Lake (via Spring Creek)
Aid Station
70.88,274 ft
21h10:00 AM +1
Crew
Billy's Rabbit Hole
Aid Station
76.610,039 ft—
Summit Lake (via Grouse Trail)
Aid Station
80.810,315 ft
26h3:00 PM +1
Crew
Drop Bags
Long Lake (via Wyoming Trail)
Aid Station
89.09,925 ft
29h30m6:30 PM +1
Mt Werner
Aid Station
95.810,358 ft—
Top of Gondola
Crew Access
97.89,052 ft—
Crew
Pacers
Finish
Finish
101.86,929 ft
30h7:00 PM +1
Crew
Drop Bags

Sign in for race-day weather at every station, points of interest, segment-by-segment analysis, pacing, and to save this race to your calendar.

No on-site camping available

Crew Access Points

Pacer Rules

  • 100-mile Hares may not have pacers except between Spring Creek Trailhead and Olympian Hall (~1.5 miles through town in both directions).
  • Only one pacer at a time is permitted.
  • Pacers may only meet runners at designated crew-access aid stations.
  • All runners may have family and friends accompany them from the gondola building at the top of Heavenly Daze to the finish (~last 4 miles).

Crew Rules

  • Crew may support runners only at designated crew-access aid stations: Fish Creek Falls (foot/bike access only), Summit Lake, Dry Lake, and Olympian Hall.
  • Hares may receive crew support at designated crew aid stations, at the gondola top, and anywhere between Spring Creek Trailhead and Olympian Hall through town.
  • No crewing or vehicle access above Dry Lake on Buffalo Pass Road. Violation causes immediate runner disqualification.
  • No crew parking or driving to Fish Creek Falls Aid Station. Crew may access only via foot or bicycle (4 miles from Olympian Hall). Violation risks runner disqualification.
  • At Dry Lake, crew may drop off and pick up runners/pacers but no parking is available. Carpooling is required; crew must leave the area promptly.
  • No crewing between aid stations. Runners may not accept aid outside of designated aid stations or crew-access points.
  • Runners are responsible for all crew actions and behaviors. Crew violations may result in the runner's disqualification.
Weather

September race days in Steamboat Springs bring reliably unpredictable mountain weather. In town, average highs are around 72°F (22°C) with overnight lows near 42°F (6°C), but the course spends long stretches above 10,000 feet where temperatures run 20–30°F colder. The overnight leg regularly drops runners into near-freezing conditions on exposed ridgelines and alpine terrain. September afternoons bring frequent afternoon thunderstorms — lightning, hail, and brief but heavy rain are common at altitude. In bad years conditions can be severe: 2011 brought 40 mph winds and blowing snow, and 2022 saw snow, fog, and mud throughout. Race directors strongly advise preparing for all extremes: blazing midday heat on the lower singletrack, freezing darkness on the alpine sections, and rapid deterioration at any point. Warm layers, rain gear, and gloves are essential regardless of the forecast.

Gear Rules

Trekking poles allowed

Required Gear

  • Headlamp, waist lamp or flashlight — plus a backup (Must include some means of backup in case the primary light fails. Checked on departure from Olympian Hall.)
  • Warm jacket (Checked on departure from Olympian Hall.)
  • Space blanket or equivalent (Checked on departure from Olympian Hall.)
  • Raincoat or equivalent (Checked on departure from Olympian Hall.)
  • Gloves (Checked on departure from Olympian Hall.)

Recommended Gear

  • Hat & Gloves
  • Extra warm clothes / long-sleeved shirt (Hypothermia is a real danger; temperatures drop dramatically after sunset at altitude.)
  • Means of purifying water (No water for over 12 miles between Mt. Werner and Fish Creek)
  • Spare light batteries
  • Small blister kit
  • Space blanket

Videos from other Run Rabbit Run events

Video thumbnail: Bananas, Coke, and Pretzels: 2023 Run Rabbit Run 50 Mile Race
Bananas, Coke, and Pretzels: 2023 Run Rabbit Run 50 Mile Race
Run Rabbit Run 50 Mile
Mackie and Juliet•2023
Video thumbnail: How To Run 100 Miles
How To Run 100 Miles
Run Rabbit Run 100 - Tortoises
REI•2017
first-timer

Race reports from other Run Rabbit Run events

The 11th Run Rabbit Run 50 Miler (CO)Run Rabbit Run 50 Mile
By Blisters, Cramps & Heaves • 2017

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Register•September 18, 2026