In 13 days · Sun, Aug 23, 2026
Don't let race day sneak up
One email during race week. That's it.
When
Sunday, August 23rd, 2026
Where
1000 Lakeside Park Drive, Saint Peters MO
Distance
5K
Typical weather
69–85°F · some rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
67–85°F
dry
2024
57–84°F
dry
2023
78–96°F
dry
2022
67–83°F
dry
2021
72–94°F
dry
2020
69–90°F
dry
2019
67–82°F
dry
2018
60–79°F
dry
2017
61–77°F
dry
2016
65–76°F
rain
Best months to race in Missouri →
Race-day forecast · Sunday, Aug 23
Cloudy · 61–88°F
Sunday, Aug 23starts near 61°F · 24% chance of rain · wind up to 12 mph
About this race
Event Overview
- Event: 370 Lakeside Triathlon
- Date: 2026-08-23
- Location: 1000 Lakeside Park Drive, Saint Peters, MO
- URL: 370 Lakeside Triathlon Registration
Race Highlights
- Course: Flattest, fastest route starting in beautiful 370 Lakeside Park
- Start: Beach start to enhance the experience
- Scenery: Amazing country roads in St. Charles County
- Run: Includes park trails for a scenic run experience
Race Options
- Variety: Options for everyone from a 5k run to half distance
- Categories: Super sprint and sprint for newbies
- Additional: Includes duathlon, aquabike, and aquathlon options
- Participation: Suitable for all levels of athletes
Important Information
- ID Requirement: All athletes MUST show a Photo ID
- Packet Pickup: Athletes must pick up their own race packet, NO EXCEPTIONS
- Additional Info: Course maps and schedule of events available
- Volunteers: Sign up for volunteer opportunities
More Details
- Website: For further details including course maps, visit MSERacing
Course map
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