Mt. Sneffels Marathon

Ouray, CO, USA · August 15, 2026
partly-cloudy-day53°·72° high·Light·Dry
8
Weather
Pace Calc
Course
Race Info
FAQ
History

Race Day Weather

partly-cloudy-day
53°at start
73° high
Light
Dry

Cool start, warming trend ahead

Runners will face a temperature increase from 53°F at the start to 72°F by the end. With light winds from the W and gusts up to 22 mph, pacing should be adjusted accordingly. Given the humidity at 52% and the possibility of light rain, hydration should be prioritized throughout the race.

Race day forecast available in 10 days
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Pace Calculator

Distance: 26.2mi
0:00:00
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Race Info

The Mt. Sneffels Marathon offers runners a challenging and scenic journey through Colorado's San Juan Mountains. The course features a mix of gravel and packed dirt roads, with an elevation gain of approximately 1,500 feet, providing a true test of endurance. Participants are treated to breathtaking views of Mount Sneffels and the surrounding peaks, making it a memorable experience for all.

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FAQ

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When is the 2026 Mt. Sneffels Marathon?

The 2026 Mt. Sneffels Marathon will be held on Saturday August 15, 2026.

What will the weather be like for the 2026 Mt. Sneffels Marathon?

The forecast calls for a high of 74°F and a low of 51°F with a 11% chance of rain.

Historical Weather

Based on 18 years of data
Avg Temp
71°F
L:52° H:72°
RunScore
8
Conditions
Rain Freq
11%
2 of 18 yrs
Wind7mph
Dew37°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2025 Mt. Sneffels Marathon

Partly cloudy throughout the day.

2025
partly-cloudy-day
53°/68°-
8

2024 Mt. Sneffels Marathon

Partly cloudy throughout the day with rain.

2024
clear-day
54°/74°-
8

2023 Mt. Sneffels Marathon

Partly cloudy throughout the day.

2023
clear-day
54°/78°-
8

2022 Mt. Sneffels Marathon

Partly cloudy throughout the day with late afternoon rain.

2022
partly-cloudy-day
53°/65°-
8

2021 Mt. Sneffels Marathon

Partly cloudy throughout the day.

2021
cloudy
45°/66°-
8

2019 Mt. Sneffels Marathon

Clear conditions throughout the day.

2019
clear-day
56°/76°-
8

2018 Mt. Sneffels Marathon

Clear conditions throughout the day.

2018
clear-day
52°/78°-
8

2017 Mt. Sneffels Marathon

Becoming cloudy in the afternoon with late afternoon rain.

2017
clear-day
47°/78°-
8

2016 Mt. Sneffels Marathon

Partly cloudy throughout the day.

2016
partly-cloudy-day
50°/73°-
8

2015 Mt. Sneffels Marathon

Partly cloudy throughout the day with early morning rain.

2015
partly-cloudy-day
51°/66°-
8

2014 Mt. Sneffels Marathon

Clear conditions throughout the day.

2014
clear-day
50°/77°-
8

2013 Mt. Sneffels Marathon

Partly cloudy throughout the day with rain.

2013
clear-day
51°/68°Light
8

2012 Mt. Sneffels Marathon

Partly cloudy throughout the day.

2012
partly-cloudy-day
57°/76°-
8

2011 Mt. Sneffels Marathon

Partly cloudy throughout the day.

2011
clear-day
54°/80°-
8

2010 Mt. Sneffels Marathon

Partly cloudy throughout the day.

2010
clear-day
55°/64°-
8

2009 Mt. Sneffels Marathon

Partly cloudy throughout the day with a chance of rain throughout the day.

2009
partly-cloudy-day
55°/65°Light
8

2007 Mt. Sneffels Marathon

Clear conditions throughout the day.

2007
clear-day
53°/77°-
8

2005 Mt. Sneffels Marathon

Clear conditions throughout the day.

2005
clear-day
52°/71°-
9

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Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

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