Silverton Alpine 50K

Silverton, CO, USA · July 17, 2027·
partly-cloudy-day50°·70° high·Calm·Dry
7
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Race Day Weather

partly-cloudy-day
50°at start
73° high
Light
Dry
Your goal
0:00:00

Cool start — fast day potential, big temp swing

A cool 50°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 73°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 258 days
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Pace Calculator

31.1mi
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Race Plan

Get your personalized Silverton Alpine 50K 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 Silverton Alpine 50K starts and finishes at Memorial Park in Silverton, Colorado, and runs a loop on the Alpine Loop jeep roads in the San Juan Mountains. The route passes the ghost mining towns of Howardsville, Eureka, Animas Forks and Gladstone and tops out at California Pass, above 12,900 feet. It is the longest race of the weekend and adds an opening section through Niagara Gulch to the marathon course, and the road is open to off-highway vehicles, so dust is common. The race runs on the Saturday of race weekend, the day before the Kendall Mountain Run.

Race weekend

Saturday, July 17
6:30 AM50K (31.1 mi)
7:00 AMMarathon (26.2 mi)8:00 AM8M (8.0 mi)

FAQ

When is the 2027 Silverton Alpine 50K?

The 2027 Silverton Alpine 50K will be held on Saturday July 17, 2027.

What is the time limit for the Silverton Alpine 50K?

The time limit for the Silverton Alpine 50K is 11 hours.

What will the weather be like for the 2027 Silverton Alpine 50K?

The forecast calls for a high of 74°F and a low of 49°F with a 8% chance of rain. Check our detailed hourly forecast above for the best 50K race plan.

Historical Weather

Based on 21 years of data
Avg Temp
59°F
L:51° H:69°
RunScore
8
Conditions
Rain Freq
14%
3 of 21 yrs
Wind3mph
Dew37°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-night
61°/70°-
6
2025
cloudy
55°/69°-
8
2024
clear-day
47°/66°-
9
2023
clear-day
52°/71°-
8
2022
clear-day
53°/78°-
7
2021
clear-day
57°/78°-
7
2020
clear-day
51°/79°-
8
2019
rain
53°/70°Light
7
2018
clear-night
52°/71°-
7
2017
clear-night
52°/72°-
8
2016
clear-night
49°/67°-
9
2015
clear-night
52°/71°-
8
2014
rain
52°/59°Light
9
2013
cloudy
58°/64°-
8
2012
clear-night
48°/68°-
9
2011
clear-night
54°/72°-
7
2010
partly-cloudy-night
54°/63°-
9
2009
clear-night
52°/75°-
8
2006
partly-cloudy-night
48°/56°Light
10
2005
clear-night
45°/66°-
9
2004
clear-night
34°/63°-
10