Sawatch Ascent

Sun September 24, 2023 Nathrop, CO 81236 US Directions


High Lonesome 100 qualifier!

Sawatch 50/50

$320.00 $310.00


$155 7:00AM MDT - 6:00PM MDT
115 spots left. Registration ends September 22, 2023 at 11:59pm MDT


Not only do we care about providing an event that is financially accessible to as many as possible, we also really hate making you buy things you don't want. During registration, you can select not to receive a t-shirt or a medal which will reduce your cost by $10 for each option you remove. We call this the "No Frills" registration.

No matter what option you select, all registrants will receive the following: live runner tracking, professional course photos, a 100ml Laws Finishers Whiskey bottle, and a free BBQ at the finish line


$120 - No Frills Registration - no shirt, no medal

$140 - General Registration


$135 - No Frills Registration - no shirt, no medal

$155 - General Registration

Race Website

Additional race information can be found at


A classic, high-alpine, vert-heavy Colorado 50k! Get some miles on the Colorado Trail and run all the way to 13,150' feet in elevation! Starting and finishing at the base of Mount Princeton, runners are treated to panoramic views of the Sawatch Range and the gorgeous Arkansas River Valley. The race runs in a large lollipop and is essentially one long 7000' foot climb and one long 7000' descent. The beginning and end have a mix of dirt and paved roads, but the middle is 25 miles of uninterrupted singletrack, including 12 miles on the Colorado Trail. Yet, despite the amount of vert this course is surprisingly runnable, especially for a runner with mountain experience. Add in the changing aspen leaves and the (usually) perfect fall weather and you've got yourself one hell of end-of-the-season race. As an added bonus, the course shares some similarities with the High Lonesome 100 course and is put on by the same folks at Freestone Endurance.

The race starts on Sunday, September 24th, 2023 at 7am and runners have 11 hours to complete the course. There are three aid stations (not counting the Start/Finish) that are fully stoked with the typical aid station fare as well some tasty treats to surprise you and water and Tailwind are available at all aid stations. Runners can camp at the start/finish line for $15/night and space is limited to 35 spots. The race is capped at 250 runners and registration is $140 in January and $155 after that. Runners get a finishers medal, race shirt, 100ml bottle of Laws Whiskey, free full resolution professional images, and free drinks (alcoholic and non) and BBQ at the finish line.

As an added challenge, runners can attempt the Sawatch 50/50 by registering for the West Line Winder 50k on the same weekend! Finishers of the Sawatch 50/50 will get a special award and place awards for the top 3 overall men and women.

Cancellation, Deferral, and refund Policy: Runners can defer 50% of their entry to the following year so long as they request it by September 1st. We also carry cancellation insurance which covers a lot of situations where we might cancel...however it does NOT cover pandemic related cancellations. If the race cancels and it's covered under our insurance, you get a FULL refund. However, if it's not covered under the policy then there is no refund or deferral available. Please see the website for the full details. 

Key details:

  • When: Sunday September 24th, 2023 at 7:00am
  • Where: Nathrop, Colorado (coordinates: 38.74275, -106.15964)
  • Cost: $140 in January, $155 after that (50% deferral available before Sept 1)
  • Course: 33 miles, 7000' of vert, 8200' low point to 13,150' high point, average elevation 9800'
  • Trail type: 26 miles of singletrack, 4.5 miles of pavement, 2.5 miles of gravel roads
  • Cutoff: 11 hours
  • Extra challenge: Sawatch 50/50!


Co Rd 321
Nathrop, CO US 81236

Race Contact Info

If you have any questions about this race, please contact the race director at



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