Casper Marathon

Casper, WY, USA · June 7, 2026
partly-cloudy-day53°·69° high·Breezy·Dry
8
Weather
Course
Race Info
FAQ
History

Race Day Weather

partly-cloudy-day
53°at start
70° high
Breezy
Dry

Cool start, warming trend ahead

Runners will face a temperature rising from 51°F at the start to a peak of 69°F. Winds will be out of the WSW at 11 mph, with gusts up to 26 mph, creating a headwind throughout. With humidity around 50%, hydration should be prioritized, especially as temperatures rise; a conservative pace is advised.

Race day forecast available in 12 days
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Race Info

The Visit Casper Marathon seeks to create a unique and memorable race experience for all its participants whether they are first time runners or elite athletes. We strive for a safe, enjoyable, and yet a challenging race events that pushes racers to achieve their best within our supportive running atmosphere and the Casper Wyoming community. Source

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Area Map

Course Map

Course Map Unavailable

We don't have course map data for Casper Marathon yet. If you have a GPX file (or other format) for this race, we'd love to add it!

FAQ

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When is the 2026 Casper Marathon?

The 2026 Casper Marathon will be held on Sunday June 7, 2026.

Is the Casper Marathon a Boston Marathon Qualifier?

Yes, the Casper Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2026 Casper Marathon?

The forecast calls for a high of 74°F and a low of 49°F with a 10% chance of rain.

Historical Weather

Based on 22 years of data
Avg Temp
74°F
L:52° H:75°
RunScore
7
Conditions
Rain Freq
14%
3 of 22 yrs
Wind11mph
Dew39°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2025 Casper Marathon

Clear conditions throughout the day with late afternoon rain.

2025
clear-day
57°/90°-
7

2024 Casper Marathon

Becoming cloudy in the afternoon with afternoon rain.

2024
clear-day
57°/75°-
8

2023 Casper Marathon

Partly cloudy throughout the day with afternoon rain.

2023
partly-cloudy-day
55°/63°Light
8

2022 Casper Marathon

Becoming cloudy in the afternoon.

2022
clear-day
53°/72°-
8

2021 Casper Marathon

Clear conditions throughout the day.

2021
clear-day
57°/77°-
8

2019 Casper Marathon

Clear conditions throughout the day.

2019
clear-day
51°/77°-
8

2018 Casper Marathon

Clear conditions throughout the day.

2018
clear-day
46°/76°-
8

2017 Casper Marathon

Clear conditions throughout the day.

2017
clear-day
55°/82°-
8

2016 Casper Marathon

Partly cloudy throughout the day.

2016
partly-cloudy-day
50°/81°-
8

2015 Casper Marathon

Partly cloudy throughout the day with rain clearing later.

2015
cloudy
54°/71°-
9

2014 Casper Marathon

Partly cloudy throughout the day with rain.

2014
partly-cloudy-day
49°/65°Light
7

2013 Casper Marathon

Clear conditions throughout the day.

2013
clear-day
46°/79°-
7

2012 Casper Marathon

Clear conditions throughout the day with afternoon rain.

2012
clear-day
59°/83°-
8

2011 Casper Marathon

Clear conditions throughout the day.

2011
clear-day
48°/85°-
7

2010 Casper Marathon

Clear conditions throughout the day.

2010
clear-day
50°/74°-
8

2009 Casper Marathon

Cloudy skies throughout the day with rain.

2009
cloudy
40°/48°Light
7

2008 Casper Marathon

Partly cloudy throughout the day.

2008
clear-day
41°/63°-
6

2007 Casper Marathon

Clear conditions throughout the day.

2007
clear-day
48°/71°-
8

2006 Casper Marathon

Clear conditions throughout the day.

2006
clear-day
55°/85°-
8

2005 Casper Marathon

Clear conditions throughout the day.

2005
clear-day
52°/72°-
7

2004 Casper Marathon

Clear conditions throughout the day.

2004
clear-day
70°/91°-
6

2003 Casper Marathon

Partly cloudy throughout the day with late afternoon rain.

2003
cloudy
52°/72°-
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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