Garmin Olathe Marathon

Runners will face temperatures rising from 53°F at the start to 63°F by the finish, with an average humidity of 66%. Wind will be a factor with a tailwind from miles 2-12, followed by headwinds from miles 13-27. Adjust pacing strategies accordingly, starting conservatively and taking advantage of the gentle rolling course, especially during the tailwind sections.

Race day forecast available in 155 days

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

Pre-raceRace windowPost-race

Pace Calculator

Distance: 26.2mi

Finish time

0:00:00

HH:MM:SS

Pace

—

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

Pace

—

Enter a finish time to see your race-day finish and True Effort, with what the weather, wind and hills do to it.

Common Goals:

Get forecast alerts for Garmin Olathe Marathon

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

Race Plan

Get your personalized Garmin Olathe Marathon 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

About the Garmin Olathe Marathon

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

Website

Race weekend

Saturday, April 24

6:45 AMMarathon (26.2 mi)

Half Marathon (13.1 mi)

10K (6.2 mi)

Garmin Olathe Marathon FAQ

When is the 2027 Garmin Olathe Marathon?

The 2027 Garmin Olathe Marathon will be held on Saturday April 24, 2027.

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.

What will the weather be like for the 2027 Garmin Olathe Marathon?

The forecast calls for a high of 70°F and a low of 50°F with a 13% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

What is the weather usually like for the Garmin Olathe Marathon?

Over the 21 years racecast.io has race-day weather for (2003 to 2026), it averaged 49°F at the start and 55°F by a typical finish. Rain fell during race hours in 3 of those years (2003, 2014 and 2015).

What was the hottest Garmin Olathe Marathon?

Of the 21 years on record, 2004 was the warmest, reaching 75°F during race hours. The coldest start was 2013, at 34°F.

What was the windiest Garmin Olathe Marathon?

Of the 21 years on record, 2011 was the windiest, with wind averaging 19 mph during race hours. The calmest was 2012, at 4 mph.

Garmin Olathe Marathon weather history

Based on 21 years of data

Avg Temp

51°F

L:49° H:55°

RunScore

Conditions

Rain Freq

14%

3 of 21 yrs

Wind11mph

Dew41°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Garmin Olathe Marathon Clear conditions throughout the day. 2026	54°/65°	-	49°
2025 Garmin Olathe Marathon Cloudy skies throughout the day. 2025	53°/54°	-	47°
2024 Garmin Olathe Marathon Partly cloudy throughout the day. 2024	43°/46°	-	23°
2023 Garmin Olathe Marathon Partly cloudy throughout the day. 2023	35°/41°	-	26°
2019 Garmin Olathe Marathon Clear conditions throughout the day. 2019	35°/46°	-	25°
2018 Garmin Olathe Marathon Partly cloudy throughout the day. 2018	48°/50°	-	29°
2017 Garmin Olathe Marathon Clearing in the afternoon with early morning rain. 2017	47°/53°	-	38°
2016 Garmin Olathe Marathon Partly cloudy throughout the day. 2016	56°/63°	-	53°
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	53°/56°	Light	43°
2013 Garmin Olathe Marathon Partly cloudy throughout the day. 2013	33°/43°	-	24°
2012 Garmin Olathe Marathon Clear conditions throughout the day. 2012	37°/52°	-	36°
2011 Garmin Olathe Marathon Partly cloudy throughout the day with early morning rain. 2011	38°/39°	-	29°
2010 Garmin Olathe Marathon Clear conditions throughout the day. 2010	47°/62°	-	38°
2009 Garmin Olathe Marathon Clear conditions throughout the day. 2009	44°/53°	-	31°
2008 Garmin Olathe Marathon Partly cloudy throughout the day. 2008	38°/41°	-	31°
2007 Garmin Olathe Marathon Partly cloudy throughout the day with early morning rain. 2007	58°/62°	-	56°
2006 Garmin Olathe Marathon Clear conditions throughout the day. 2006	62°/64°	-	50°
2005 Garmin Olathe Marathon Clear conditions throughout the day. 2005	55°/67°	-	54°
2004 Garmin Olathe Marathon Partly cloudy throughout the day with late afternoon rain. 2004	68°/75°	-	66°
2003 Garmin Olathe Marathon Partly cloudy throughout the day with morning rain. 2003	59°/62°	Light	57°

More KS Races

Bill Snyder Highway Half and 5K

2027-05-29 · 21.100km · Manhattan, KS, USA

Gobbler Grind Marathon

2026-11-22 · 42.200km · Overland Park, KS, USA

TopCity Half Marathon

2027-05-01 · 21.100km · Topeka, KS, USA

Lago Maggiore Marathon

2026-11-08 · Marathon · Verbania, Italy

ColleMar-athon

2027-05-09 · Marathon · Barchi, Pesaro e Urbino, Italy

Jacksonville Marathon

2026-12-12 · Marathon · Jacksonville, FL, USA

Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide