Mt. Sneffels Marathon

Ouray, CO, USA · August 15, 2026

56°·73° high·Light·Dry

Weather

Race Day Weather

56°at start

73° high

Light

Dry

Cool start, warming up

Runners will face a temperature rise from 53°F at the start to a peak of 73°F. Winds will be light at 8 mph from the S, with gusts up to 22 mph. With humidity at 39% and a dew point of 37°F, conditions are favorable, but runners should adjust their pacing as temperatures climb.

Race day forecast available in 111 days

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Distance: 26.2mi

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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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Course Map

FAQ

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 73°F and a low of 53°F with a 0% chance of rain.

Historical Weather

Based on 18 years of data

Avg Temp

71°F

L:52° H:72°

RunScore

Conditions

Rain Freq

11%

2 of 18 yrs

Wind7mph

Dew37°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Mt. Sneffels Marathon Partly cloudy throughout the day. 2025	53°/68°	-	43°
2024 Mt. Sneffels Marathon Partly cloudy throughout the day with rain. 2024	54°/74°	-	36°
2023 Mt. Sneffels Marathon Partly cloudy throughout the day. 2023	54°/78°	-	36°
2022 Mt. Sneffels Marathon Partly cloudy throughout the day with late afternoon rain. 2022	53°/65°	-	47°
2021 Mt. Sneffels Marathon Partly cloudy throughout the day. 2021	45°/66°	-	41°
2019 Mt. Sneffels Marathon Clear conditions throughout the day. 2019	56°/76°	-	25°
2018 Mt. Sneffels Marathon Clear conditions throughout the day. 2018	52°/78°	-	31°
2017 Mt. Sneffels Marathon Becoming cloudy in the afternoon with late afternoon rain. 2017	47°/78°	-	44°
2016 Mt. Sneffels Marathon Partly cloudy throughout the day. 2016	50°/73°	-	27°
2015 Mt. Sneffels Marathon Partly cloudy throughout the day with early morning rain. 2015	51°/66°	-	48°
2014 Mt. Sneffels Marathon Clear conditions throughout the day. 2014	50°/77°	-	33°
2013 Mt. Sneffels Marathon Partly cloudy throughout the day with rain. 2013	51°/68°	Light	40°
2012 Mt. Sneffels Marathon Partly cloudy throughout the day. 2012	57°/76°	-	42°
2011 Mt. Sneffels Marathon Partly cloudy throughout the day. 2011	54°/80°	-	29°
2010 Mt. Sneffels Marathon Partly cloudy throughout the day. 2010	55°/64°	-	41°
2009 Mt. Sneffels Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2009	55°/65°	Light	56°
2007 Mt. Sneffels Marathon Clear conditions throughout the day. 2007	53°/77°	-	32°
2005 Mt. Sneffels Marathon Clear conditions throughout the day. 2005	52°/71°	-	46°

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