2017 Registration is Closed.

2018 Registration Opens on November 1st.

A percentage of the registration fees will be donated to local cross country teams.


Registration closes May 15, 2017

Ultra Signup logo

Registration Costs: 100 K – $130.00, 55 K – $75.00.  Registration also includes a unique running shirt and a post race meal.

An added registration site processing fee of approximately 6% is added during registration.

Refund Policy:

Full refunds, minus $20, will be given through May 13

50% refunds will be given from May 13 to June 8

No refunds will be given after June 8

To receive a refund you must email us ( and inform us of the drop out 0r remove yourself on Ultra Sign Up.

All refunds will be mailed out on June 8th

Distance Changes
We realize there are often reasons to change race distances after you have registered. We will allow changes between both events if made by June 18th. Here is our policy:

100K to 55K: There is no refund for the price difference. Email notification by June 18th is required.

55K to 100K: A check or cash for the difference in price ($55) can be turned in at the pre-race check-in or mailed to us. Email notification by June 18th is required.

SPECIAL RIVER FLOAT TRIP AND DINNER: A Pre-pace half day float trip on the scenic and beautiful Salmon River and a post float catered dinner for the entire family and/or crew, all before the Friday pre-race check-in and briefing for just $55 per person; what can be better?  NOTHING!   Don’t miss out on this special event just for runners and family/friends/crew attending the Beaverhead Endurance Runs. Sign up soon, only 100 slots are availableClick Here to learn more.

Trucker Hats for Sale: Last year we had the hats made for the RD’s with a few extra left over that we sold at the pre-race meeting. Due to their popularity we have decided to offer them for sale at UltraSignup.  You can buy them in the STORE.  The cost is $20/hat.  The hats are high quality with the logo stitched using thread.

Beaverhead Hat

  • ML

    Is there a limited field for the 55k race? If so, does it normally fill up near a certain date?

    • David Tarkalson

      ML, Sorry for the delay, I just saw this comment. The race filled up on December 22nd this year. Registration for the 2018 event will open November 1, 2017. Thanks.

  • Ryan Craig

    If and when registrants cancel will registration open again? Thanks for your time!

    • David Tarkalson

      No. The opened spots will be filled with waitlist runners. I hope this helps

  • WG

    Any chance it is possible to get on a waitlist for a possible opening in the 2017 100k at this point?

  • Racheal Zeiler

    Any idea what the dates are yet for 2018? I’m trying to figure out if I can run Missoula Marathon and this one.

    • David Tarkalson

      July 14th

      • Racheal Zeiler

        Thank you