In 2 days · Sat, Aug 1, 2026
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Saturday, August 1st, 2026
Grant Trail, St. Louis MO
1 Mile · 5K · 10K · Half
70–86°F · some rain risk
See last 10 years
On this date: rain 5 of the last 10 years
2025
66–80°F
dry
2024
77–91°F
rain
2023
68–87°F
dry
2022
74–95°F
rain
2021
64–83°F
dry
2020
66–74°F
rain
2019
63–83°F
dry
2018
62–82°F
dry
2017
71–84°F
rain
2016
73–84°F
rain
Best months to race in Missouri →
Race-day forecast · Saturday, Aug 1
Rain likely · 69–80°F
Saturday, Aug 1starts near 69°F · 66% chance of rain · wind up to 14 mph
About this race
Race Overview
Join us for the Heatwave Half Marathon, 10K, & 5K! A sun-soaked summer challenge that’s perfect for the whole family.
Event Highlights
- Great Swag: designer shirt & custom medal
- Chip-timing: with live results and awards
- Free Photos: capture your race day moments
- FREE Ice Cream: at the finish to help you cool off
Additional Information
- Family-Friendly: Grab your friends and family—you won’t want to miss this one!
- Virtual Option: 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 Pricing: Youth-based pricing is available: ages 12 & under are only $17!
- Registration Details: Half Marathon/10K/5K registration includes a custom bib, designer shirt, and an awesome finisher medal!
Special Events
- 1 Mile Registration: untimed, includes a custom bib, designer shirt, and an awesome finisher medal!
- Kid’s Dash: a fun, untimed dash for ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specially crafted medal!
- Free Entry: If your child wants to run the kid’s dash without swag, they’re welcome to run free on race day!
- Shirt Guarantee: Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!
Event Link
For more details, visit us at Heatwave Half Marathon St. Louis.
Course map
Train with a club
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