Beaverhead 100K Trail Run

July 13th, 2019 at 5:00 am

UPDATE 12/21/18: The 100K is full.  A waitlist is open.  Based on past drop rates we will add approximately 30 people from the list.  Remember that some people on the waitlist will decline an invitation so even if there are more than 30 on the list get on it if you want to run.


The 2019 Race is a WS100 Qualifying Race.  Runners must finish in under 19 hours

UTMB Qualifying Race – 4 Points


Finishers receive a custom LICENSE PLATE and a CUSTOM HOODIE.

1ooK Qualifier: To be able to run the 100K, runners must have completed a 50K distance (or greater) race in the past 3 years (from November 1, 2015 to June 23, 2019).

  • Registration Cost: $160.00.
  • Registration closes when filled or by June 1, whatever comes first. 100K Startline Runner Limit: 175).  A waitlist will be started after initial registration limit is filled.
  • WAITLIST RULES:  When selected from the waitlist, the selected runner has 48 hours to accept the invitation and finalize payment.  If the invitation is not accepted after 48 hours the runner will be dropped from the waitlist and the next runner invited.  It will be wise to watch the waitlist and your email inbox.
  • Registration  includes a unique running shirt, post race meal, finisher license plate, and custom finisher hoodie.
  • 1ooK Qualifier: To be able to run the 100K, runners must have completed a 50K distance (or greater) race in the past 3 years (from November 1, 2015 to June 23, 2019).

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

Course Overview

The race starts at Bannock Pass (11 miles east of Leadore ID on Hwy ID-29, 56 miles south west of Dillon MT on Hwy MT-324).

The course from the start to mile 49 is on the Continental Divide National Scenic Trail (CDT). The CDT is on or very near the Continental Divide from the start to mile 49. The length of Continental Divide covered in this event also represents the boarder between Idaho and Montana. At mile 49, runners will leave the official CDT for the remainder of the course, but will continue along the true Continental Divide border for another 5 miles (mile 54). FYI, at mile 49 the CDT dips into Montana then turns parallel to the Continental Divide in-order to divert away from a section of hard to navigate terrain consisting of high mountains, skree, and cliffs. We as masochistic trial running RD’s think you should experience some of the beautiful skree fields but not the cliffs, so we will drop off the Continental Divide at mile 54 and descend into the head waters of Bohannon Creek and onto the finish line.

Because you are following the Continental Divide [separation between drainage to the Pacific Ocean (Idaho side) and Atlantic Ocean (Montana side)] you will always be high in the mountains following the natural elevation changes along the divide and will not ascend or descend into the deep creek and river valleys that boarder the course, except when you drop off the divide to the finish. Because of this, the entire race is at a high elevation with respect to this part of Idaho and Montana. This course has a good mix of terrain, with a mix of climbs, descents, smooth trail and technical sections.

The course is easy to follow.  The first time we (the RD’s) covered the entire course on a reconnaissance run  we did not get lost.  The main reason for this is that there exists good official CDT signage.  The official signage consists of CDT signs on trees and posts, the “i” mark on trees (note the new and old variations), and Rock cairns. On some parts of the course they help mark the trail and the Continental Divide near the trail. Besides these abundant existing markings, we will use additional yellow flagging to ensure that the course is clearly marked.

Course Flyover/Preview

Packet Pickup & Check In

The packet pick-up will take place from 4:00 PM to 6:00 PM on Friday July 13th at the Salmon City Park (On Hwy 28 south of Salmon next to the softball fields and gold course).   A pre-race meeting will take place at 6:00 PM following packet pick-up at the same location. For those traveling in from Montana or camping in Leadore and cannot make it to the packet pick-up in Salmon, you can pick up your packet at the starting line starting at 4:00 AM.

All runners must check in at the starting line. You will receive your race bib at this time. This allows race management to know who is on the course. Allow yourself at least 30 minutes to check in before the race starts.

Aid Stations

See the the course map below for aid station locations. Aid stations will be well stocked with typical ultra-running food, water, and sports drink.

Drop Bags

Drop bag service will be available for the 100K runners at Lemhi Pass AS. We recommend that runners who are attending the Friday pre-race check-in drop off bags then, but for runners not able to make it to the check-in they can drop bags off at the 100K start on race morning as they check-in.


This is a no pacer race. This is not big deal though, think of it this way: At most 100 mile events, you would not be picking up a pacer until around mile 60; by the time you reach mile 60 in this race you are almost done.

Cutoffs (3)

1. Cutout AS (mile 38) @ 3:30 PM (10.5 hrs); 2. Goldstone AS (mile 46) @ 6:00 PM (13 hrs); 3. Janke Lake AS (mile 50.5) @ 7:30 PM (14.5 hrs). Runners must check out of these aid stations before the cutoff time or they will be pulled from the course and taken to the finish line with the aid station personnel. The cutoffs are for the safety of the runners and will be strictly enforced. A head lamp and/or flash light is recommended for those who will be at the Janke Lake AS at 4PM and later. Picking up a light source in a drop bag or from crew at Lemhi Pass is advisable. There is no finish line cutoff, but runners must check out of the Janke Lake AS by 7:30 PM to finish.

Distance Changes

We realize there are often reasons to change race distances after you have registered.  We will only allow 100K runners to move to the 55K.  We will not allow runners to move up (55K to 100K).   Here is our policy:

  • If you want to change distances email me at  In the subject line type Distance Change Request.  You will be placed in a distance change wait list and processed in the order based on the rules below.
  • Distance changes will only be made if a slot is available.  If a slot is not made available you will have to stay in the distance you registered for.
  • Race distance changes will be given priority over wait list runners when a slot is made available.
  • Runner moving down (100K to 55K) will not receive a refund in registration fee difference.
  • No distance changes can be made after June 15th.

Race Splits

Ultra Splits offers 100K split analysis based on past Beaverhead results, take a look at this cool tool!

Course, Topo, and Elevation Maps