Race Day Information

 Listed below are a few pieces of helpful info regarding the race. If you have additional questions, please contact us via email, or call (970) 429-2093.

Race Information Packet

Participant Waiver

KMZ file Marathon

KMZ File Heavy Half

Race Guide: including cut off times, bib packet pick up, aid stations and more.  2021 Race Guide

Race Start Time & Time Limit (New start location for the marathon)

The Marathon will start at 6:30 am on the pedestrian mall at the clock tower, (intersection of Cooper Ave and Mill St.) downtown Aspen. Participants will need to finish the race by 2:30 pm (8-hour limit).

The 1/2 Marathon will start at 7:30 am near Rio Grande Park in downtown Aspen. (6-hour limit)

Race Participation Cap

The Aspen Backcountry Marathon is limited to 175 participants and the 1/2 Marathon is limited to 175 participants as well. (numbers may increase once capacity levels for Pitkin County are determined)

Colorado Outdoor Recreation Search & Rescue (CORSAR) Card

Pitkin County requires that all participants obtain a valid CORSAR card for the day of the event. These are available at the Ute Mountaineer and the Tenth Mountain Hut Association. Save yourself some time and purchase online. Click here to purchase online. Cost: $3 one year card; $12 for five years.

Timing Chips

Timing Chips will be given out from 4-6pm on Friday, August 6th  during packet pick-up. They will be secured to the back of your bib.  All Participants must obtain a timing chip or they will not receive a finish time.

Race Packet Pick-Up

Timing Chips/Packet pick up – Friday, August 6th  from 4-6pm location TBD. There will be a recommended racers meeting during the packet pick-up. We will have packet pick up at both start lines, starting an hour before race start.

IMPORTANT: If you are having someone else pick up your packet you must include this Authorization Form- signed by you – and a copy of your ID.

Directions to the Race from Highway 82: The race start for the Marathon is on the Pedestrian Mall (Cooper Ave & Mill Street) follow Highway 82 into Aspen where it becomes Main Street. Turn right on N. Mill St, the make the first right on to Hyman Ave. walk south on Mill St. to Cooper Ave.

The Start/Finish of the Half Marathon is at Rio Grande Park, located on Rio Grande Place in Aspen. To get there (from Glenwood Springs), follow Highway 82 into Aspen where it becomes Main Street. Turn left on N. Mill St, the make the first right on to Rio Grande Place. The race start/finish is at Rio Grande Park on the left.

From Snowmass: Follow Brush Creek Road from Snowmass to Hwy 82. Turn right at the light to merge onto Hwy 82 into Aspen and follow it into where it becomes Main Street.  Same as above.

*Note: On-street parking next to the finish will be limited and street closures may occur. Covered parking is available near the start at the Rio Grande Parking Garage: 427 Rio Grande Place off Mill Street. Free parking is located in the west end starting at Bleeker Street and Monarch St. going west. No paid parking on the weekends. 

Race Cancellation

Every effort will be made to hold the race, but the director reserves the right to delay, shorten or even cancel the event. There will be no refunds in the event of race cancellation.

Safety Plan

Aspen Backcountry Marathon Safety Plan. This race will be a limited support race. There will be food and water stations, volunteer crews with EMT and First Responder experience. Please do not expect a high level of runner support like other marathons can offer. The logistics of a backcountry race makes additional support very difficult. In addition, we have to be careful about impacting the environment since it is at a high altitude, remote, and on National Forest Service land.

Cupless Race

The Aspen Backcountry Marathon and Half Marathon is a CUPLESS COURSES! For hydration, we are selling a reusable / foldable soft-cup from UltrAspire to use at the aid stations during packet pick up. We recommend participant in addition to the reusable cups, to carry their own hydration system.


Overall winner awards will be presented at 11:45 am. Top finisher awards by age group will be handed out as the winners come in.