Mt. Sneffels Half Marathon

Ouray, CO, USA · August 21, 2027

53°·65° high·Calm·Dry

Weather

Race Day Weather

53°at start

73° high

Light

Dry

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Cool start, warming finish

Runners will face temperatures rising from 53°F at the start to 65°F by the finish. With light winds from the W at 6 mph, it won't be a significant factor. Humidity is moderate at 51%, so maintaining hydration is essential. Starting conservatively is advisable as temperatures climb.

Race day forecast available in 281 days

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Distance: 13.1mi

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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.

Website

Race weekend

Saturday, August 21

7:00 AMHalf Marathon (13.1 mi)

10K (6.2 mi)

Course Map

FAQ

When is the 2027 Mt. Sneffels Half Marathon?

The 2027 Mt. Sneffels Half Marathon will be held on Saturday August 21, 2027.

What will the weather be like for the 2027 Mt. Sneffels Half Marathon?

The forecast calls for a high of 73°F and a low of 51°F with a 13% chance of rain.

Historical Weather

Based on 18 years of data

Avg Temp

56°F

L:52° H:60°

RunScore

Conditions

Rain Freq

1 of 18 yrs

Wind3mph

Dew40°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Mt. Sneffels Half Marathon Partly cloudy throughout the day. 2025	53°/57°	-	47°
2024 Mt. Sneffels Half Marathon Partly cloudy throughout the day with rain. 2024	54°/63°	-	34°
2023 Mt. Sneffels Half Marathon Partly cloudy throughout the day. 2023	54°/63°	-	42°
2022 Mt. Sneffels Half Marathon Partly cloudy throughout the day with late afternoon rain. 2022	53°/56°	-	45°
2021 Mt. Sneffels Half Marathon Partly cloudy throughout the day. 2021	45°/55°	-	39°
2019 Mt. Sneffels Half Marathon Clear conditions throughout the day. 2019	56°/65°	-	28°
2018 Mt. Sneffels Half Marathon Clear conditions throughout the day. 2018	52°/62°	-	33°
2017 Mt. Sneffels Half Marathon Becoming cloudy in the afternoon with late afternoon rain. 2017	47°/56°	-	43°
2016 Mt. Sneffels Half Marathon Partly cloudy throughout the day. 2016	50°/58°	-	30°
2015 Mt. Sneffels Half Marathon Partly cloudy throughout the day with early morning rain. 2015	51°/54°	-	49°
2014 Mt. Sneffels Half Marathon Clear conditions throughout the day. 2014	50°/61°	-	33°
2013 Mt. Sneffels Half Marathon Partly cloudy throughout the day with rain. 2013	51°/60°	-	39°
2012 Mt. Sneffels Half Marathon Partly cloudy throughout the day. 2012	57°/64°	-	45°
2011 Mt. Sneffels Half Marathon Partly cloudy throughout the day. 2011	54°/64°	-	31°
2010 Mt. Sneffels Half Marathon Partly cloudy throughout the day. 2010	55°/64°	-	41°
2009 Mt. Sneffels Half Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2009	55°/57°	Light	57°
2007 Mt. Sneffels Half Marathon Clear conditions throughout the day. 2007	53°/63°	-	34°
2005 Mt. Sneffels Half Marathon Clear conditions throughout the day. 2005	52°/60°	-	45°

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