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Built on bad decisions in Boulder, CO.

Snow Mountain Ranch 50K

Draft Listing
  1. Aravaipa Running
  2. 2027 Edition

Three high-altitude loops near 10,000 feet in Colorado's Rocky Mountains

Explore the Course
Interactive map with aid stations, elevation & weather
DirectionsExplore

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All trail races in Colorado→
September 18, 2027
Saturday 6:30am MDT start
Granby, CO
United States
31.4 miles
Multiple Loops Course
4,240 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
Links
WebsiteInstagramFacebookYouTube
2015
Established
4:04 M / 5:08 W
Course Record

What Makes It Great

The Snow Mountain Ranch 50K is a high-altitude dirt trail race set in Colorado's Rocky Mountains at the YMCA of the Rockies near Granby. Three loops on an out-and-back lollipop course take runners through rolling hills and pine forests, climbing to 9,844 feet with 1,412 feet of gain per loop. The race rewards early starters with crisp mountain air and September fall foliage. A mandatory loop turnaround cutoff (begin 3rd loop by 6-hour mark) ensures all finishers cross the line by 3:00 PM.

Difficulty

Intermediate
6/10

Some ultra experience recommended

High Altitude
Steep Climbing
Variable Weather
Sun Exposure

Race Highlights

Approaches 10,000 feet
Three loops climb to 9,844 ft on the slopes of Colorado's Rocky Mountains near Granby
Peak fall foliage
September timing puts runners in prime position for autumn color in Colorado's pine and aspen forests
12th annual festival
Running since 2015, one of Colorado's longest-standing September trail running festivals
Pacers on the final loop
Bring a pacer for loop 3 to pace yourself through the last 10 miles to the finish
100% dirt terrain
Every mile is on natural dirt trails—no pavement, no gravel, just mountain singletrack

Snow Mountain Ranch 50K

Granby, CO, United StatesSeptember 18, 2027

September 18, 2027

Snow Mountain Ranch 50K is a multi-loop trail race in Granby, CO, United States, held on September 18, 2027. The course covers 31.4 miles, climbs 4,240 ft, and has an 8h30m cutoff.

Course map for Snow Mountain Ranch 50K
DistDistance31.4 mi
GainElevation Gain4,240 ft
LimitCutoff8 h 30 m
High AltitudeSteep ClimbingVariable WeatherSun Exposure

Entry Timeline

Race DaySeptember 18, 2027

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.
31.4 mi
Distance
Multiple Loops
Route
8h30m
Cutoff Time
9,268 ft
Average Elevation
4,240 ft
Total Ascent
4,240 ft
Total Descent
9,872 ft
High Point
8,665 ft
Low Point
Explore Course
Course map for Snow Mountain Ranch 50K
Launch Course Explorer

Aid Stations & Cutoffs

LocationMileElevationCutoffCrewPacersDrop bags
Start
Start
0.08,701 ft—
Finish
Finish
30.88,691 ft
8h30m3:00 PM

Aid station details for this race are still being filled in. Cutoffs and access rules come from the race’s own published information and can change — check the official race details before planning around them.

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.

On-Site Camping Available

Camping available on YMCA of the Rockies property. Pricing starts at $61/night with electricity, sewer hookups, and full bathroom/shower facilities. Use promo code FG20 for September bookings. Campground open through September 14. Call Central Reservations at 888-613-9622. Indoor lodging also available on property.

Crew Access Points

Pacer Rules

  • Pacers are allowed for the final loop only (loop 3 of 3).

Crew Rules

  • Crews are welcome to support runners at the start/finish area.
Weather

September mornings at Snow Mountain Ranch start crisp and cool, warming through the mid-morning. Afternoon thunderstorms are common in the Colorado Rockies at altitude—most runners finish by 3:00 PM but conditions can shift quickly.

High Altitude

Course reaches 9,844 ft with significant time above 8,500 ft—acclimatization recommended

Rapid Weather Changes

Afternoon thunderstorms are common in September in the Colorado Rockies

Gear Rules

Required Gear

No required gear specified

Recommended Gear

No recommended gear specified

Featured Videos

Video thumbnail: Snow Mountain Ranch Trail Race
Snow Mountain Ranch Trail Race
Aravaipa Running•2025

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