Garmin Olathe Marathon

Olathe, KS, USA • April 25, 2026

Race Day Weather

50°

66° high

Breezy

Dry

Cool start, tailwind advantage

Runners will face a temperature rise from 50°F at the start to 65°F by the finish, with humidity averaging 64%. A tailwind will aid runners from Miles 2 to 11, but a headwind will challenge them between Miles 13 and 25. Maintaining hydration and pacing conservatively in the warmer final segments will be crucial for performance.

Race day forecast available in 29 days

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Pre-raceRace windowPost-race

Pace Calculator

Distance: 26.2mi

Target Finish Time

0:00:00

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Pace

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Weather Adj.

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Common Goals:

Join us for a marathon, half marathon, 10k, Munchkin Marathon or Senior Walk through the beautiful streets and trails of Olathe. This year marks the 22nd anniversary of the event (click here to learn more about the history!) The city of Olathe is 20 minutes southwest of downtown Kansas City, located in Johnson County, Kansas. Come experience our Midwest charm in the Land of Oz. Source

FAQ

When is the 2026 Garmin Olathe Marathon?

The 2026 Garmin Olathe Marathon will be held on Saturday April 25, 2026.

Is the Garmin Olathe Marathon a Boston Marathon Qualifier?

Yes, the Garmin Olathe Marathon is an official Boston Marathon qualifier.

What is the time limit for the Garmin Olathe Marathon?

The time limit for the Garmin Olathe Marathon is 6.5 hours.

Historical Weather

Based on 20 years of data

Avg Temp

61°F

L:48° H:61°

RunScore

Conditions

Rain Freq

25%

5 of 20 yrs

Wind14mph

Dew44°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Garmin Olathe Marathon Cloudy skies throughout the day. 2025	54°/56°	-	47°
2024 Garmin Olathe Marathon Partly cloudy throughout the day. 2024	42°/52°	-	24°
2023 Garmin Olathe Marathon Partly cloudy throughout the day. 2023	34°/45°	-	27°
2019 Garmin Olathe Marathon Clear conditions throughout the day. 2019	34°/54°	-	26°
2018 Garmin Olathe Marathon Partly cloudy throughout the day with rain in the morning and afternoon. 2018	47°/54°	Light	33°
2017 Garmin Olathe Marathon Clearing in the afternoon with early morning rain. 2017	47°/61°	-	37°
2016 Garmin Olathe Marathon Partly cloudy throughout the day. 2016	56°/69°	-	54°
2015 Garmin Olathe Marathon Partly cloudy throughout the day with rain in the morning and afternoon. 2015	61°/62°	Light	58°
2014 Garmin Olathe Marathon Partly cloudy throughout the day with morning rain. 2014	54°/72°	Light	47°
2013 Garmin Olathe Marathon Partly cloudy throughout the day. 2013	32°/50°	-	25°
2012 Garmin Olathe Marathon Clear conditions throughout the day. 2012	36°/61°	-	37°
2011 Garmin Olathe Marathon Clearing in the afternoon with early morning rain. 2011	37°/52°	-	32°
2010 Garmin Olathe Marathon Clear conditions throughout the day. 2010	46°/71°	-	39°
2009 Garmin Olathe Marathon Clear conditions throughout the day with late afternoon rain. 2009	44°/60°	-	38°
2008 Garmin Olathe Marathon Partly cloudy throughout the day. 2008	39°/48°	-	32°
2007 Garmin Olathe Marathon Partly cloudy throughout the day with rain clearing later. 2007	58°/63°	Light	53°
2006 Garmin Olathe Marathon Clear conditions throughout the day. 2006	61°/70°	-	53°
2005 Garmin Olathe Marathon Clear conditions throughout the day. 2005	56°/77°	-	56°
2004 Garmin Olathe Marathon Partly cloudy throughout the day with late afternoon rain. 2004	70°/79°	-	67°
2003 Garmin Olathe Marathon Partly cloudy throughout the day with rain. 2003	59°/70°	Light	58°