JUNE 19th, 2021

Registration now closed. See you this summer!


Field sizes have been set with Colorado Covid-19 guidelines in mind, and therefore may be smaller than they have been in the past. Our ultimate goal is to host our events this year and we are making changes where necessary. Because of this, events may sell out faster than normal. As we monitor Colorado’s state guidelines, more slots may become available. In this event, we will accept athletes in a rolling order from our waitlist, and then reopen to the public.


Run through the historic mining district’s challenging old mining roads and trails, and hit a high of 13,185 feet at Mosquito Pass during the Leadville Trail Marathon or Heavy Half Marathon. The views will leave you breathless, if you’re not already. 

Each Leadville Qualifying Series race provides 25-100 qualifying slots to the Leadville Trail 100 Run presented by La Sportiva, based on the total number of registered racers at each qualifier event. Half of the qualifying spots will be allocated based on the top age-group performances and half will be drawn among runners who have finished the qualifier race within the allocated cut-off time.

Qualifying slots will be distributed at the Awards Ceremony. Qualifying slot winners MUST BE PRESENT, as the roll-down qualifiers rule will be in effect at each event. All qualifier slots will be awarded and redeemed on race day. You must pay your entry to the LT100 Run within the three days after the event. You will have the option to register for the current year or the following year’s LT100 Run and must decide when accepting your qualification slot. All entries into the LT100 Run are non-transferrable.

> Visit our LT100 Run Qualification System page for more information

Pricing for 2021 Marathon: 

1/20-1/31 $115
2/1-5/31 $125
6/1-6/17 $135
On-site registration* $155

Pricing for 2021 Heavy Half: 

1/20-1/31 $95
2/1-5/31 $110
6/1-6/17 $120
On-site registration* $130

*On-site registration will only be available if events are not sold out.

Military and student discounts are offered for our Leadville qualifier events. Please email a photo of your current card to leadville@ltevents.zendesk.com while specifying which event you are inquiring about.

General overview of the weekend. Times subject to change.


4pm-8pm Packet Pickup


8:00am Race Start

4:30pm Race Finish


*Please review 2018 Guide as 2019 Marathon had severe snow impact causing significant course changes. Stay tuned for 2021 Athlete Guide.

View the 2018 Guide Here

Although we look forward to seeing  you at our events, we understand certain things may come up that prevent you from attending. Please make note of our deferral and refund policies:

Athlete Deferral Policy

  • 90 Days prior to the event- Free Deferral
  • Up to 2 weeks prior: Flat deferral fee
  • Less than 2 weeks – Increased flat deferral fee
  • Do not repay following year
  • Deferrals are only eligible for the following year.
  • No refunds, no transfers, no exceptions.

If the Leadville Race Series Cancels Event

If we have to cancel due to a series of reasons, including pandemic, natural disaster, etc.

Athlete Option 1: Deferral 

  • Complimentary, guaranteed entry into the following year’s event

Athlete Option 2: Refund 

  • 90+ days out – 70% refund
  • 60-89 days out – 50% refund
  • 30-59 days out – 40% refund

*No refunds on service fees or donations


 Though the 2019 course was re-routed due to extreme snow conditions, the 2021 Marathon and Heavy Half will be back to the traditional courses.

Heavy Half Aid Locations

A 1/2 Lincoln Gulch 2.8 Miles

B  Resurection 4.5 Miles

C  Mosquito Pass 7.75 Miles

A 1/2 Lincoln Gulch 11.0 Miles

FINISH 15.5 Miles

Marathon Aid Locations

 H20 2.4 Miles

A Venir 6.1 Miles

A 1/2 Lincoln Gulch 8.7 Miles

B Resurection 10.3 Miles

C Mosquito Pass 13.7 Miles

B Resurection 17.1 Miles

A 1/2 Lincoln Gulch 18.7 Miles

A Venir 21.3 Miles

H20 23.8 Miles

FINISH 26.2 Miles

Online award shipment will close on October 31st. If you would like your award after this date, please email Kelsey Conine (kconine@lt.life) to have your award shipped to you.

*Please note that awards will not be shipped until the end of our race series season, in September.

Our races aim to be Zero Waste.. Look for recycle and compost bins at every aid station and start/finish. Please discard any waste 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.

For more information on LRS Zero Waste initiatives please see our partner organization’s website.

From the very beginning, volunteers have made the Leadville Marathon & Heavy Half 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. Thanks in advance for your help — we couldn’t do it without you!

With further questions, contact our Volunteer Coordinator: Richard Naprstek

Click here to view results from the 2019 Leadville Trail Marathon & Heavy Half

Visit the link below to view historical results from the Leadville Trail Marathon & Heavy Half Marathon.

Historical Results