Aspen Asphyxiation

At 8:00am on Saturday, June 3, 2023

Start/End at Fort Tuthill, big lot next to the Bike Park.


Aspen Asphyxiation is back in 2023 with a new route and new trails. We will start at Fort Tuthill and then shortcut through the city to Elden via Sinclair/AZT. We will then climb up the brand new Lower Brookbank and descend the gnarly Big Band/Afterglow. We will climb Dogfood and fire/flood survivors: AZT and Secret. We will connect via Freidlein Prairie Rd, Veit Spring Trail and Snowbowl Rd to Aspen Corner. From there it’s a fun descent on AZT and Moto. We will venture into the unknown by means of Hidden Hollow Road, Mesa Observatory forest service roads and A1 Mountain Rd. We will cross the railroad tracks via an interesting but straightforward solution. Then it’s on to Soggy Bottom Ranch Rd. to uncharted roads all the way to Rogers Lake Connector trail. Good ole FUTS and Soldier trail will take us back to Fort Tuthill.

Water available for filtering only in Shultz Creek and Roger’s Lake (and a number of small streams which may or may not still be there by next week).


Start time and route are provided here and it is up to the participant to understand the route, and also have full responsibility for their navigation and well being. Since the events are self-supportive, it should be understood that these are for experienced adult backcountry cyclists only. If you question your ability to complete such an event, it is best that you consider another option before trying one of these. Also, maps, gps devices, water filtration units, and other backcountry tools are methods to ensure you complete the race. Therefore it is up to you – and you alone – to ensure your safety!!

GPX file:


Strava Cue Sheet:

2023 Cue Sheet



10 responses to “Aspen Asphyxiation

  1. New course will be posted about a week before the event. So much snow and water running up there. We will have to play it by the ear.

  2. Heads up that the Overland Expo is happening at Fort Tuthill that weekend. This event draws a massive crowd so there is zero chance of finding parking in the big lot next to the bike park, or anywhere else in the area. It would be wise to pick a new start/finish location and avoid the Fort Tuthill trails altogether that weekend (unless you are going to the expo).

    • Thanks. We are looking at possible 6/3 because the trails are pretty wet and muddy higher up and Pinyons and Pines backpacking race is set for May 18th.

  3. Has anything been decided about the start?

  4. Date changed to June 3

  5. Looks like most of the snow melted and trails are drying up. The route will be posted soon.

  6. will the route be marked with signs/flags?

    • Hi Britt. These are grassroots events with no course markings and are self supported. You’ll need to have the map loaded on a GPS device and be familiar with how to use it. Hope this helps!

    • Ha ha, Britt. Actually if you and Ray can volunteer your time and set up a water station by Aspen Corner that would be super helpful.

  7. We are going paperless for this one (there have been too many lists go missing over the years). If you are on Strava, make sure you make you ride public. As long you rode the course correctly for most part, I will find you. If you are not using Strava or kept it private or missed chunks of the course, send your time and link to your ride to or just post it in the comments. Thanks.

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