Half Marathon & 5K

June 11-12, 2021

West Yellowstone, MT

Check out your Virtual Expo!

Even though we can't hold a full blown expo at the race this week, our sponsors and vendors still want to be a part of your race!

Join us for the FB live virtual expo!

Tuesday June 1 | 12:30 PM MST

Open your virtual swag bag for discounts from our race vendors!

Race Details

Date: June 11-12, 2021
Location: West Yellowstone, MT
Weather: 35° – 67°F

Half Marathon (June 12)
Start Time: 6:00am *staggered start
Course Type: Loop 
Stroller friendly? No
Dogs allowed? No

5K & Fun Run (June 11)
5K Start Time
Course Type: Loop
Stroller friendly? No
Dogs allowed? No

Bib Pickup & Expo
June 11, 2021, 9am–5pm
Old Airport Rd. - West Yellowstone, MT (same location as the race!)

Registration Periods & Pricing

Early: $113 Aug. 14 – Nov. 16
Regular:  $134  Nov. 16 – Feb. 14
Late: $155  Feb. 15 – Race Expo

Refund Policy
Refunds available ONLY during Early and Regular Registration ($10 fee)
*Refunds not available due to weather

Deferral, Race Transfer, and Bib Transfer any time through the race expo ($20 fee). Full policy details.

Want to use a deferred credit? 
Login to RunSignup, click Deferrals, Complete Deferments

Travel & Other Info

Fly Into
West Yellowstone (WYS) - 40 min.
Bozeman (BZN) - 1 hr. 42 min.
Jackson (JAC) - 2 hrs. 45 min.
Idaho Falls (IDA) - 1 hr. 43 min.

Driving Directions: To the expo location 

We recommend looking for lodging in West Yellowstone, MT

Race Guide

The race guide contains the most up-to-date answers to almost any question you may have. Please read it!

This is what memories are made of!

The Half Marathon Course

The majority of the race takes place on a dirt road and trail in Gallatin National Forest immediately southwest of West Yellowstone, MT. (If there's rain, there could be puddles so be prepared for that possibility.)

We'll cross a beautiful bridge over the South Fork Madison River, and into the forest for a bit of a climb (about 200 feet). If you have to use bear spray it will be in this section (just kidding, but not really).

The course gets a bit technical in places with some rocks and a less defined path. (The path is clearly marked, but if you're in front you'll be running through some weeds.) 

Free Custom Training Program for this Race!

No matter your skill level, when you're pushing your limits it's nice to have a little guidance. We're excited to offer FREE training programs for all skill levels.
Check it out ≫

Run the race. Then discover Yellowstone!

Yellowstone National Park

The Park

If you've never been to Yellowstone National Park, get ready. It's going to blow your mind. There's nothing like it anywhere else in the world. 

Pine trees. Geysers. Canyons. Waterfalls. Hot springs. Hot pots. Paint pots. Buffalo. Elk. Eagles. Wolves. Grizzly bears. Scenic overlooks. Hiking trails. Fresh air. Freedom.

Doubles & Quadruple

If you aren't familiar with our events that have 5K distances in addition to a half marathon, runners can sign up for both and earn extra swag and an extra medal. We call these "doubles". In 2020, our Grand Teton and Yellowstone events will take place on back-to-back weekends in June!

With two half marathons and two 5K races, we have some exciting news. We are introducing a new QUADRUPLE- the Grand Quad! That's signing up and running all 4 events. If you sign up for the quadruple you are essentially doing the Grand Teton Half & 5K and the Yellowstone Half & 5K. Runners get some Grand Quad swag, all the doubles medals, plus the Quadruple medal- That's 8 medals total!

Here are all the options:

Moose Double
Grand Teton Half Marathon & Grand Teton 5K
Runners earn: Moose Double swag + 2 finisher medals (1 for each race) + 1 Moose Double medal

Bison Double
Yellowstone Half Marathon & Yellowstone 5K
Runners earn: Bison Double swag + 2 finisher medals (1 for each race) + 1 Bison Double medal

Grizzly Double
Grand Teton Half Marathon & Yellowstone Half Marathon
Runners earn: Grizzly Double swag + 2 finisher medals (1 for each race) + 1 Grizzly Double medal

Grand Quad
Grand Teton Half Marathon, Grand Teton 5K, Yellowstone Half Marathon, & Yellowstone 5K
Runners earn: Grand Quad swag + 4 finisher medals (1 for each race) + 1 Moose Double medal + 1 Bison Double medal + 1 Grizzly Double medal + 1 Grand Quad medal = 8 medals!

Note: If you've run with us in the past, you may recall the Caldera Triple. With the new Grand Teton 5K and the quadruple added, we've retired the Caldera Triple for now. 

>>View more Double/Quad details here

Registration is now open

Registration Periods

Early:  Aug. 14 – Nov. 15
Regular:  Nov. 16 – Feb. 14, 2021
Late:  Feb. 15 – Race Expo

*There is a limited number of entries to each race, and this event may sell out. If the event is sold out, registration will close regardless of registration period.

Need to upgrade to the Bison Double, grizzly double, or Grand Quad?

Upgrading an existing registration to a Double or Quad package is treated as a transfer and can be completed via Run Signup

It's easy!
>> Log into your Run Signup Account                                              >> Go to "Profile"                                                      >> Click "Manage Registration"
>> Click "Transfer Event" on the top menu bar

>> Click "Start Transfer"
>> Choose your Event  
>> Continue and complete your registration!

*if you deferred into this race or transferred from another race your race credit will be $0 and we will need to help you upgrade your event. Contact us at

Charity Bibs

Want to run for a great cause? Fundraise for your chosen race and your registration fee could be waived. All funds go to Wander Project to support efforts in and around the communities that host our events. We primarily fund three project areas including: preservation and conservation of public lands; education around local ecology and stewardship; and the promotion of health and well-being. Learn more about Charity Bibs here!

Other events you're Going to Love!

Meet our partners!