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Heatwave Half Marathon - St. Louis

Name: Heatwave Half Marathon - St. Louis
Start: 2026-08-01
End: 2026-08-01
Location: St. Louis, Missouri

location_city St. Louis

location_on Missouri

flag United States

calendar_today 01 Aug, 2026

directions_run Running

language Official Website

About the Event

Join us for the Heatwave Half Marathon, 10K, & 5K!
A sun-soaked summer challenge that’s perfect for the whole family.

The fun includes –

Great Swag – designer shirt & custom medal
Chip-timing with live results and awards
Free photos
FREE ice cream at the finish to help you cool off
Plenty of hot fun in the summer sun!

Grab your friends and family—you won’t want to miss this one!

Can’t make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag!

Youth-based pricing is available: ages 12 & under are only $17!

Half Marathon/10K/5K registration includes a custom bib, designer shirt, and an awesome finisher medal!
1 Mile registration is untimed and includes a custom bib, designer shirt, and an awesome finisher medal!
Kid’s Dash is a fun, untimed dash for ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specially crafted medal for our youngest runners! (If your child wants to run the kid’s dash without swag, they’re welcome to run free on race day!)

Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!

Races Offered

Other

Aug 01, 2026

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Distance — Other

terrain

Type — Road running

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213 days remaining

5K

Aug 01, 2026

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Distance — 5K

terrain

Type — Road running

timer

213 days remaining

10K

Aug 01, 2026

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Distance — 10K

terrain

Type — Road running

timer

213 days remaining

Half-Marathon

Aug 01, 2026

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Distance — Half-Marathon

terrain

Type — Road running

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213 days remaining

Ultra

Aug 01, 2026

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Distance — Ultra

terrain

Type — Road running

timer

213 days remaining

Weather Overview

These values represent the 3-year monthly averages for August in St. Louis.

Temp (°C)

Feels Like (°C)

thermostat 20.4° / 30.0°

wb_sunny 21.8° / 31.8°

Wind (km/h)

Humidity (%)

air 9.3 /

water_drop 73.5%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 20.4° / 30.0°

wb_sunny 21.8° / 31.8°

air 9.3 km/h

water_drop 73.5%

About St. Louis

The Gateway City of St. Louis is the epitome of the modern Midwestern metropolis. Missouri's second-largest city is vibrant but laid-back, populous but navigable, historic but still relevant. The city's planners have created an aesthetically beautiful city, with plenty of green space amidst buildings both old and new, framed by the majestic Mississippi and Missouri rivers. And capping it all is the world's tallest man-made monument, the beautiful and iconic Gateway Arch.