Ralston Creek Half Marathon

Arvada, CO, USA · February 14, 2027
partly-cloudy-day38°·41° high·Light·Dry
10
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Ralston Creek Half Marathon race day weather

partly-cloudy-day
38°at start
43° high
Light
Dry
Your goal
0:00:00

Cool start, steady finish

Runners will face a start temperature of 38°F, climbing to 42°F by the finish. Winds will be light from the WSW at 6 mph, with gusts up to 17 mph. With comfortable humidity at 46%, runners should dress in layers for the pre-race wait and maintain a steady pace throughout.

Race day forecast available in 78 days
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About the Ralston Creek Half Marathon

The Ralston Creek Half Marathon is a February road race on the west side of Arvada, Colorado, near Denver. The course mixes roads and bike paths: the first five miles are fairly flat with a barely noticeable climb, miles 5 to 6.5 roll with one good climb, and the high point is atop Ralston Mesa at mile 7.75, after which it runs mostly downhill and flat to the finish. A 5K starts the same morning, and half marathon runners who expect to take more than 2:45 can use an early start. The race is the last of three events in the Racing Underground Winter Running Series, after the Superior Stocking Run 5K in December and the Yeti Chase 5K/10K in January.

Race weekend

Sunday, February 14
9:45 AMHalf Marathon (13.1 mi)
10:00 AM5K (3.1 mi)
Area Map
Course Map

Ralston Creek Half Marathon FAQ

When is the 2027 Ralston Creek Half Marathon?

The 2027 Ralston Creek Half Marathon will be held on Sunday February 14, 2027.

What is the time limit for the Ralston Creek Half Marathon?

The time limit for the Ralston Creek Half Marathon is 3.75 hours.

What will the weather be like for the 2027 Ralston Creek Half Marathon?

The forecast calls for a high of 46°F and a low of 20°F with a 6% chance of rain.

What is the weather usually like for the Ralston Creek Half Marathon?

Over the 3 years racecast.io has race-day weather for (2023 to 2025), it averaged 30°F at the start and 36°F by a typical finish. It has not rained during race hours in any of those years.

What was the hottest Ralston Creek Half Marathon?

Of the 3 years on record, 2023 was the warmest, reaching 43°F during race hours. The coldest start was 2025, at 17°F.

What was the windiest Ralston Creek Half Marathon?

Of the 3 years on record, 2023 was the windiest, with wind averaging 13 mph during race hours. The calmest was 2025, at 1 mph.

Ralston Creek Half Marathon weather history

Based on 3 years of data
Avg Temp
33°F
L:30° H:36°
RunScore
10
Conditions
Rain Freq
0%
0 of 3 yrs
Wind6mph
Dew14°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-day
17°/27°-
10
2024
clear-day
33°/38°-
10
2023
partly-cloudy-day
41°/43°-
10