Casper Marathon

Casper, WY, USA · June 6, 2027·
partly-cloudy-day51°·67° high·Breezy·Dry
8
Register
Weather
Pace Calc
Course
Race Info
FAQ
History

Race Day Weather

partly-cloudy-day
51°at start
71° high
Breezy
Dry
Your goal
0:00:00

Cool start, warming trend ahead

Runners will face a temperature rise from 51°F to 70°F during the race, with a light breeze from the WSW at 10 mph. Humidity will remain moderate at 50%, ensuring a comfortable experience. As temperatures increase, runners should consider adjusting their pace and staying hydrated throughout.

Race day forecast available in 213 days
partly-cloudy-night10
partly-cloudy-night10
partly-cloudy-day10
partly-cloudy-day10
partly-cloudy-day8
partly-cloudy-day7
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day6
partly-cloudy-day5

Pace Calculator

26.2mi
0:00:00
HH:MM:SS
Pace
—

Enter a finish time to see what race day does to it.

Common Goals:

Get forecast alerts for Casper Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Info

The Casper Marathon is an annual road race held in Casper, Wyoming, first run in 2003. The course starts at the WYO Sports Ranch and finishes at Crossroads Park, following the Platte River Trails system through downtown Casper. The marathon is certified as a Boston Marathon qualifier and is sanctioned by USA Track and Field. The event also includes a half marathon, 10K, and relay divisions. Source

Website

Race weekend

Sunday, June 6
6:00 AMMarathon (26.2 mi)
6:00 AMHalf Marathon (13.1 mi)6:00 AM10K (6.2 mi)
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

Ask a Question about the Casper Marathon

Racecast Concierge (free during beta)

Ask a question about the Casper Marathon and we'll do the hard part and find the answer for you within 48 hours.

By using Racecast Concierge, you agree to receive email alerts pertaining to the Casper Marathon and general racecast.io updates.

When is the 2027 Casper Marathon?

The 2027 Casper Marathon will be held on Sunday June 6, 2027.

Is the Casper Marathon a Boston Marathon Qualifier?

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

What is the time limit for the Casper Marathon?

The time limit for the Casper Marathon is 6.5 hours.

What will the weather be like for the 2027 Casper Marathon?

The forecast calls for a high of 73°F and a low of 49°F with a 7% chance of rain.

Historical Weather

Based on 23 years of data
Avg Temp
57°F
L:47° H:66°
RunScore
8
Conditions
Rain Freq
9%
2 of 23 yrs
Wind7mph
Dew44°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults

2026 Casper Marathon

Clear conditions throughout the day.

2026
clear-day
51°/77°-
7

2025 Casper Marathon

Clear conditions throughout the day with late afternoon rain.

2025
clear-day
47°/77°-
7

2024 Casper Marathon

Becoming cloudy in the afternoon with afternoon rain.

2024
clear-day
56°/68°-
8

2023 Casper Marathon

Partly cloudy throughout the day with afternoon rain.

2023
partly-cloudy-day
52°/62°-
7

2022 Casper Marathon

Becoming cloudy in the afternoon.

2022
clear-day
51°/66°-
8

2021 Casper Marathon

Clear conditions throughout the day.

2021
clear-day
57°/67°-
7

2019 Casper Marathon

Clear conditions throughout the day.

2019
clear-day
44°/66°-
8

2018 Casper Marathon

Clear conditions throughout the day.

2018
clear-day
39°/63°-
9

2017 Casper Marathon

Clear conditions throughout the day.

2017
clear-day
46°/72°-
8

2016 Casper Marathon

Partly cloudy throughout the day.

2016
cloudy
48°/70°-
7

2015 Casper Marathon

Partly cloudy throughout the day with rain clearing later.

2015
rain
53°/64°Light
8

2014 Casper Marathon

Partly cloudy throughout the day with rain.

2014
clear-day
44°/61°Light
8

2013 Casper Marathon

Clear conditions throughout the day.

2013
clear-day
36°/63°-
9

2012 Casper Marathon

Clear conditions throughout the day with afternoon rain.

2012
clear-day
53°/70°-
7

2011 Casper Marathon

Clear conditions throughout the day.

2011
clear-day
45°/74°-
7

2010 Casper Marathon

Clear conditions throughout the day.

2010
clear-day
43°/62°-
8

2009 Casper Marathon

Cloudy skies throughout the day with rain.

2009
cloudy
41°/45°-
10

2008 Casper Marathon

Partly cloudy throughout the day.

2008
clear-day
36°/54°-
10

2007 Casper Marathon

Clear conditions throughout the day.

2007
clear-day
40°/64°-
8

2006 Casper Marathon

Clear conditions throughout the day.

2006
clear-day
48°/71°-
8

2005 Casper Marathon

Clear conditions throughout the day.

2005
clear-day
45°/64°-
9

2004 Casper Marathon

Clear conditions throughout the day.

2004
clear-day
63°/83°-
6

2003 Casper Marathon

Partly cloudy throughout the day with late afternoon rain.

2003
partly-cloudy-day
50°/62°-
8

More WY Races

Jackson Hole Marathon
2027-09-25 · 42.200km · Jackson Hole, WY, USA
Dam Marathon (WA)
2027-09-04 · 42.200km · Orting, WA, USA
Aspen Backcountry Marathon
2027-07-31 · 42.200km · Aspen, CO, USA
Tri-Cities Marathon
2026-10-25 · 42.200km · Richland, WA, USA
Providence Marathon
2027-05-02 · 42.200km · East Providence, RI, USA
Green Bay Marathon
2027-05-16 · 42.200km · Green Bay, WI, USA
Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

Submit a correction

Spot something wrong or missing for the Casper Marathon? Let us know and we'll update it.

You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR

Submit a race

Missing a race? Send it in and we'll add it to Racecast.