Harriman Park 25k/50k

August 18th, 2018

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Harriman 8.1 Mile (Tall)/25K (Grande)/50K (Venti)

2018 Race August 18th

Welcome to the Harriman Trail Race page.  2018 will be the second year of this event and we hope you will join us.

The Harriman Trail Races have been expertly curated with the discerning trail runner in mind. 

Every attempt has been made to provide the ultimate in artisanal trail racing for both the wise and sage runner as well as the newcomer to the trail racing scene.

Careful attention has been paid to the design of the event, the course, the distances, the aid station fare, the critical placement of wildlife for your viewing enjoyment, random gift giving, and the post race food and beverages. 

We are also strictly limiting the number of runners so as to also provide that uncrowded, wilderness feeling (even though you can see the town of Island Park in the distance).

We believe we have truly developed what will be a sublime experience in your trail running career.  One that you will remember for at least a week. 

Additionally, for 2018 the 50K distance will be a part of the Idaho Ultra Trail Series.  Being a part of this series will add immeasurably to your trail running street cred.

Those that attended the inaugural event in 2017 had nothing but good things to say:

“That was the most sumptuous and glorious race ever, I’m coming next year and bringing 25 of my closest friends”

“The placement of the trail right next to Silver Lake was brilliant.  Viewing the lake through the small conifers on the shoreline allowed me to see the Trumpeter swans gently floating on the water”

“Def the best”

“That cold PBR at the finish line was like heaven in a can. It was even served at the correct temperature.”

“The course marking was superb, I never had any questions about which way to go”

“Sleeping in the dorm with 30 other runners the night before the race was one of the best experiences of my life”

This wondrous event will take place at Harriman State Park, near Island Park, ID.


August 18th, 2018


50K begins at 7am, the 8.1 Mile and 25K will begin at 9am.

Check in:

You may appear beginning Friday at 3pm and lasting about 8pm. We will resume check in at 5:30am Saturday morning.  If the race does not fill prior to registration closing, then there will be race day registration available.


Harriman State Park. This is near Island Park, ID, about 30 minutes south of West Yellowstone.


8.1 Mile – $43.12 until August 1, then it’s $53.23

25K – $70.35 until August 1, then it’s $80.46
50K – $86.51 until August 1, then it’s $96.74

Dorm bed – $12.64 (there are only 35 beds available) 

Extra Meals – $5.78 each (this is for family members and/or friends, runners get their meal as part of their entry.)

Register Here:

Ultra Sign Up Logo

Registration will open February 1, 2018

Entry Limits:

150 runners total


The courses for all three distances are in a word, beautiful, wildlife may abound, many trees, sweet buffed out, pine needle covered single track, stunning views of the Teton Mountains as well as the local valley. 

The entire course is 25K in length, the 8.1 mile race will take a shortcut back to the finish, and the 50K is twice around the course.

Harriman 25k Map and Elevation profile

Here is a link to the course from a runner that ran it last year:  https://www.strava.com/activities/1141890407

Course markings will consist of flour arrows raised from free-range wheat, directional signs mounted on sustainably raised, non-GMO fir or pine grade stakes, and ribbons made from environmentally friendly, organic, recycled plastic (I think).

Aid Stations:

Nothing has been spared in bringing you the finest in aid station fare.  There is one aid station that you will access multiple times during your journey.  The food selection is wide ranging.  Including cookies, chips, a nice selection of sodas, water, sports drink, as well as other tasty treats.  Aid station personnel will be at your beck and call during your stay.  The 8.1 mile runners will visit this aid station one time, the 25K runners will visit twice, and the 50K runners will have the privilege of visiting four times.


There are a limited number of beds available in the 5-star dormitory.  Sleeping facilities consist of rooms with either two or four bunk beds with mattresses.  You will need to bring your own bedding and the facility is only available for Friday night.  The dormitory also has modern bathrooms and hot showers available for your use.

Please note that there are no camping facilities inside the park.  There are several forest service campgrounds in the area plus dispersed camping is available.  Check the website for the Caribou-Targhee National Forest for details.

Post Race Festivities:

We have reserved the “Boy’s House” for your post race dining and relaxation. This building overlooks the river and has a nice area for congratulating runners as they cross the finish line.

Once you have completed your beautiful journey, join your fellow travelers on the lawn overlooking the Henry’s Fork River for a meal of hamburgers or hot dogs with all of the accoutrements, soda, and a fine selection of inexpensive beer.  Cheer on the runners as they finish, bring a fly rod and fish the river, or just hang out.

Event List

Buffalo Run (25k) - March 10th 2018

Buffalo Run (100miler, 50 miler, and 50k) - March 23rd - 24th 2018

Logan Peak Trail Run - June 16th 2018

Harriman Park 25k/50k - August 18th, 2018

Fall Classic 50k - November 11th, 2017

MTN View Trail Half Marathon - November 11th, 2017

Refund, Rollover, and Transfer Policy

Antelope Island Map

Email the RD

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