Leadville Trail Marathon & Heavy Heavy Half Marathon

Leadville, CO, USA · June 26, 2027·
partly-cloudy-day62°·70° high·Light·Dry
7
Register

Race Day Weather

partly-cloudy-day
62°at start
71° high
Light
Dry
Your goal
0:00:00

Comfortable temps, chance of rain

Starting at 62°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Temperatures rising to 71°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. There's a chance of rain, so have a backup gear plan ready.

Race day forecast available in 237 days
partly-cloudy-day10
partly-cloudy-day10
clear-day8
partly-cloudy-day7
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day7
partly-cloudy-day7

Pace Calculator

15.4mi
0:00:00
HH:MM:SS
Pace
—

Enter a finish time to see what race day does to it.

Get forecast alerts for Leadville Trail Marathon & Heavy Heavy Half Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Plan

Get your personalized Leadville Trail Marathon & Heavy Heavy Half Marathon race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Heavy Half Marathon covers about 15 miles of old mining roads and trails on the east side of Leadville, Colorado. It follows the marathon route without the Ball Mountain section and climbs to Mosquito Pass at 13,185 feet, the highest continuous pass in the country. Runners go up and back down the same path, so the course is a steady climb followed by a long descent. It runs on the Saturday of race weekend, and snow can still sit on the upper course in late June.

Race weekend

Saturday, June 26
6:30 AMMarathon (26.4 mi)
9:00 AMHeavy Half Marathon (15.4 mi)

FAQ

When is the 2027 Leadville Trail Marathon & Heavy Heavy Half Marathon?

The 2027 Leadville Trail Marathon & Heavy Heavy Half Marathon will be held on Saturday June 26, 2027.

What is the time limit for the Leadville Trail Marathon & Heavy Heavy Half Marathon?

The time limit for the Leadville Trail Marathon & Heavy Heavy Half Marathon is 7 hours.

What will the weather be like for the 2027 Leadville Trail Marathon & Heavy Heavy Half Marathon?

The forecast calls for a high of 74°F and a low of 42°F with a 5% chance of rain.

Historical Weather

Based on 24 years of data
Avg Temp
62°F
L:56° H:66°
RunScore
8
Conditions
Rain Freq
4%
1 of 24 yrs
Wind7mph
Dew31°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
58°/66°-
8
2025
clear-day
61°/71°-
8
2024
cloudy
51°/64°-
8
2023
rain
41°/46°Light
9
2022
cloudy
56°/62°-
9
2021
partly-cloudy-day
52°/64°-
7
2019
clear-day
50°/60°-
10
2018
partly-cloudy-day
59°/64°-
8
2017
clear-day
62°/70°-
8
2016
clear-day
57°/69°-
8
2015
clear-day
61°/72°-
8
2014
clear-day
54°/58°-
9
2013
cloudy
55°/73°-
7
2012
clear-day
60°/70°-
8
2011
clear-day
54°/68°-
8
2010
clear-day
55°/66°-
8
2009
clear-day
60°/74°-
7
2008
clear-day
59°/72°-
7
2007
clear-day
57°/70°-
8
2006
clear-day
57°/69°-
8
2005
clear-day
56°/69°-
9
2004
clear-day
52°/63°-
10
2002
partly-cloudy-day
54°/65°-
8
2001
clear-day
61°/72°-
7