The legendary “Race Across The Sky” 100-mile run is where it all started back in 1983. This is it. The race where legends are created and limits are tested. One hundred miles of extreme Colorado Rockies terrain — from elevations of 9,200 to 12,600 feet. You will give the mountain respect, and earn respect from all.



General overview of the weekend. Times subject to change.


11am-4pm Packet Pickup


3am-3:45am Starting Line Open at the Corner of 6th & Harrison

4am Race Start


5am 25 Hour Cutoff Time – for runners awarded the large silver and gold trophy buckles

10am 30 Hour Cutoff Time- for runners awarded the small silver and gold trophy buckles

12pm Awards Ceremony

The 100-mile out-and-back course is in the midst of the Colorado Rockies. Low point, 9,200 feet; high point is Hope Pass, 12,600 feet. Majority is on forest trails with some mountain roads. Pacers allowed after the 62-mile point.

> View the Course Map

>View the Course Profile

Please see updated 2021 Course Cut-offs Here:

Location: Time:
Mayqueen 7:45am
Outward Bound 10:00am
Half Pipe 11:30am
Twin Lakes Village 1:30pm
Hope Pass 4:00pm
Winfield 6:00pm
Twin Lakes Village 10:00pm
Half Pipe 1:15am
Outward Bound 3:00am
Mayqueen 6:30am
Finish 10:00am

Please note: Due to safety restrictions on the course wheelchair participation is not permitted.
All or part of this operation is conducted on Public Lands under special permit from the U.S. Bureau of Land Management.
This event is held on the San Isabel National Forest under a special use permit.

Course history

Since 2008, there have been six changes made to the Leadville Trail 100 Run course. The course was unchanged for many years before 2008. In 2017, we returned to the course that was last used in 2012. 

  1. County Rd 11A/Halfmoon Road to Twin Lakes Firestation. Halfmoon aid station was moved in 2009 due to a helicopter crash just before race day. Runners went a short way up Halfmoon Road then turned left onto Pipeline road. This change removed .3 miles from the full course distance and reduced the elevation gain by 750 feet.
  2. Halfmoon Road removed entirely in 2012. The access to Pipeline Road was rerouted past the gravel pits, adding about .7 miles to the round-trip distance and about 50 feet more elevation gain.
  3. Winfield Road/Colorado Trail change in 2012. The Winfield Road was finally removed from the course with the completion of the Colorado Trail into Winfield. This added 2.2 miles to the full-course distance and 365 additional feet of elevation gain.
  4. In 2013, a portion of the Colorado Trail near Winfield was removed. (View a map of the change). With a course distance about 2.7 miles longer in 2012 than in 2008, 2.3 miles and about 10 feet of elev gain were removed from a portion of the Colorado Trail near Winfield.

Aid Stations
There are 13 well-stocked aid stations along the course. Cut-off times for the aid stations do apply.

Enter your goal finish time and see approximate race times, split times, and split paces required at various segments of the course for that desired finishing time.

Download file here.

Athlete Guides will be out soon, stay tuned!

> View the 2019 Athlete Guide

2021 Awards Ceremony

  • 12:00pm Awards Ceremony
    • Location:  Lake County High School Football field  – outdoor venue
    • All awards will be presented at this time and must be picked up in person.
    • Awards will not be given to others and will not be distributed before or after the awards ceremony.
    • Finisher jackets will be distributed at the field following the completion of the awards ceremony.
    • The first 1,000 finishers will be guaranteed their sweatshirts the day after the race. 
    • If your sweatshirt is not printed overnight, it will be made and shipped to you free of charge.


  • Age Group Awards (3 deep per category)
    • 18-19 Men / Women
    • 20-29 Men / Women
    • 30-39 Men / Women
    • 40-49 Men / Women
    • 50-59 Men / Women
    • 60-69 Men / Women
    • 70+ Men / Women
    • Non-binary Open
    • Overall Male
    • Overall Female 

Note:  If you cannot pick up your award, we will mail it to you for a small fee.  After October 31st,  buckles and jackets will no longer be able to be shipped.

2021 information coming soon.

The brand new Leadville Trail 100 Run All-Access Pass provides a premium package to athletes racing the Leadville Trail 100 Run presented by La Sportiva and will enhance the overall experience of the LT100 Run weekend. Pass members will receive a plethora of benefits that will not only benefit them, but their supporters as well.

Learn more HERE.

Crew/Spectator Guides will be published no later than 4 weeks prior to race day.

We want to extend a sincere thank you for your patience while we worked through all the details around our pacer and crew guidelines for the 2021 Leadville Trail 100 Run presented by La Sportiva. After working closely with the US Forest Service, we can now provide you with concrete updates and changes to aid in your planning for race weekend.

In order to alleviate our impact and continue to permit our event over Hope Pass and into Winfield, we have worked closely with the USFS on an updated plan:

1) Going forward, no crew, spectators or pacers will be allowed in Winfield.
Winfield Aid station will still be fully and completely supported by LRS staff, medical personnel and volunteers, including a robust aid station. If you need to drop at Winfield, you will receive sag support back to Leadville. Drop bags will still be available for athletes and we encourage you to take advantage of them!
** Note: LRS staff will be on-site managing vehicles coming in/out at Winfield. Do not attempt to drive a personal or crew vehicle to Winfield, you will be turned around.

2) Pacers will now be permitted beginning at Twin Lakes inbound, mile 62.5.
Pacers can join their runners on the Twin Lakes return at mile 62.5 of their day.

3) We are limiting each runner to 2 crew members on course at a time throughout the duration of the event.
Each runner will be given 1 vehicle hang tag and 2 crew passes. Please be respectful of this new rule, as we need to follow these guidelines in order to ensure the issuance of future permits at the LT100 Run.

These changes do not come lightly and were not made to take away from the experience of this wonderful event, but rather to preserve the future of LT100 Run for years to come. We ask that you join us in working to preserve the integrity of the Leadville Race Series as we work towards a long term future of this event.

Pacers are allowed after the 62-mile point (Twin Lakes Aid Station). You may have as many pacers as you wish, although only one pacer at a time (until mile 99). Pacers may be picked up only at aid stations and approved crew points. A pacer must fill out a waiver prior to being on course. The waiver can be filled out at the aid station or you may print one here. The waiver must be turned in at an aid station to receive the proper pacer bib.

Pacing entails patience, tolerance and humor. The primary duties of a pacer include route finding, keeping the runner on pace, ensuring that the runner continues to eat and drink and making sure the runner leaves the aid stations with adequate clothing and supplies to reach the next aid station. Pacers are not allowed to push, pull, carry or tow the runner. Any special pacing situations or requests must be pre-approved by race management.

We strongly suggest you bring someone to crew for you during the race. Your race packet includes a hang-tag which should be displayed and readily visible on the crew vehicle at all times. Your crew is your personal responsibility. If your crew disregards parking instructions, race rules, directions or requests from race officials, you (the racer) will be disqualified from the race. Please make certain that your crew is not the one others complain about. We ask that your crew drive slowly and obey all posted warnings. There will be a Lake County Sheriff’s Officer patrolling road sections.

Crew access into aid stations will be limited to 2 crew members on course at a given time. If crews are meeting you at aid stations, they should allow adequate time to park and walk to the aid station. It is your responsibility as a runner to make sure that race officials time you in and out of all aid stations. The race packet includes a map and directions showing access roads and crew access points, and crew and pacer rules. Crews should become familiar with the locations of aid stations, available access roads and race rules prior to the start. Crewing is restricted to approved locations, which include Pipeline Alternate Crew Zone and all aid stations except Halfpipe and Hopeless (near Hope Pass).

If you are interested in receiving a media credential for the LT100 Run, please fill out this form.

NOTE: Media who plan to fly a drone must also submit this application, pilot license and flight plan to janine.l.prout@usda.gov by August 8, 2021.

All media will be required to attend the media briefing at 213 Harrison Ave. on Friday, 8/20 at Noon.

Additional media inquiries can be directed to Jordan Titus.

Our races aim to be Zero Waste events. Look for recycle and compost bins at every aid station and start/finish. Please discard any trash in an appropriate container. Intentional littering on the course will be grounds for disqualification. The course—on trails both public and private—travels past many historic sites and through areas of exceptional beauty. Help us keep them pristine.

We will be recycling all plastic, aluminum and cardboard during these races, and all our events. We’ll take care of this at the aid stations. At the start/finish, please ensure you place trash or recyclable materials in the appropriate containers, which will be well marked.

From the very beginning, volunteers have made the Leadville Stage Race possible. We truly appreciate all that our great volunteers do to make our races run smoothly and to make the racers’ experience unforgettable. If you are going to be in town for the 100MTB, we would love for you to join the family and pitch in. 

REMINDER – Volunteer for any Leadville Race Series event (in Leadville) for 10 hours (or more) or have someone volunteer on your behalf, and you can bypass the lottery in the next year!

Thanks in advance for your help — we couldn’t do it without you!

For 100 Mile Run Volunteer Opportunities – please sign up HERE!

2021 LT100 RUN Lottery

Lottery registration opens February 1st through February 15th (closes, February 15th at 11:59pm, MST). Lottery winners will be notified February 23rd

If unsuccessful in the lottery process and you still wish to participate in the LT100 Run, please check out our qualifier events, Training Camp entries, coaching package opportunity and charity slots available.

LT100 RUN Qualifiers

Qualifiers  serve as opportunities to advance your corral position at the LT100 RUN. Athletes do NOT need to race a qualifier to toe the LT100 MTB starting line.

Charity slots

2021 Charity Partner slots limited!

Skip the lottery and guarantee your entry by registering with a charity. Competing on behalf of one of our official charity partners not only guarantees you a spot in the  race, but also provides you the opportunity to make an impact in the community.

> View more info on the Leadville Race Series Charity Partner Program

Please note athletes must be 18 years or older on the day of the race to participate in the Leadville Trail 100 MTB. Age group awards will be based off of the age an athlete will be prior to December 31st of the race year.

UTMB Points – A Leadville Trail 100 Run finish will award you 5 points for UTMB qualification. Learn more about this race here.

Although we look forward to seeing you at our events, we understand certain things may come up that prevent you from attending. Check out our deferral tiers for each event and please let us know if you have any questions!

Complete Leadville Events Deferral Policies Here.

Visit the link below to view results and photos from the Leadville Trail 100 Run



Deferral/ Donated Entry fee- 2021 LT100 RUN deferral list:

*2021 Limited slots were available

For those athletes that were able to defer or donate their 2020 Stages Cycling Leadville Trail 100 RUN entry to be on the 2021 deferral list, we emailed through the registration platform (Run Signup) as well as through our Life Time mass communications email, information and deferral/ reserved entry links to re-register for the 2021 LT100 RUN. The window to use your deferral link (if you were on the 2021 deferral list) was October 19th-November 23rd, 2020.. Athletes that did not use their link (that were on the 2021 deferral list) have now been added to the 2022 deferral list and should expect an email from us, through Run Signup, next fall to re-register for the 2022 LT100 RUN prior to the 2022 LT100 RUN lottery. *Athletes that did not use their 2021 deferral/ reserved entry link are NOT on the 2021 LT100 RUN  roster. At this time, you may choose to enter the 2021 LT100 RUN lottery opening February 1-15th, lottery winners will be notified February 23rd. If you are drawn in the lottery you will need to pay the 2021 LT100 RUN registration fee. You will still be on the 2022 LT100 RUN deferral list.

Deferral/ Donated Entry fee- 2022/23 LT100 RUN deferral list:

If you deferred your 2020 Stages Cycling Leadville Trail 100 RUN to the 2022/23 LT100 RUN, you will receive an email and deferral/ reserved entry link from us through the registration platform (Run Signup) next fall to re-register your deferred entry for the 2022 LT100 RUN. If, at that time, you would like to roll your deferral to the 2023 LT100 RUN you will use the deferral/ reserved entry link to indicate you’d like to roll your deferral to the following year (2023 LT100 RUN). 

*No refunds are available for any registration from the cancelled 2020 Leadville Race Series events as of June 18th, 2020.

*Athletes that did not login to make a cancelled event option selection were refunded and withdrawn without guaranteed entry through any lottery.