2026 Big Betty Event

Located in picturesque St. Peter’s, Missouri is the 370 Lakeside Triathlon.

Sunday, August 22nd, 2025

Atomic Betty Members have an exuuaive 15% off discount code.

This incredible event has soooo many inclusive options:

5K Run/Walk

Super Sprint Triathlon
300m swim / 23k bike / 2 mile run

Sprint Triathlon
750m swim / 23k bike / 5k run

Sprint Collegiate Triathlon
750m swim / 23k bike / 5k run

Sprint High School Triathlon
750m swim / 23k bike / 5k run

Sprint Aquabike
​750m swim / 23k bike

Sprint Duathlon
2 mile run / 23k bike / 5k run

Sprint Aquathlon
750m swim / 5k run

Sprint Relay​​
750m swim / 23k bike / 5k run

Sprint Paratriathlon
750m swim / 23km bike / 5km run

Olympic Triathlon
​​1.5k swim / 40k bike / 10k run

Olympic Aquabike
1.5k swim / 40k bike

Olympic Duathlon​​
5k run / 40k bike / 10k run

Olympic Aquathlon
1.5k swim / 10k run

Olympic Relay​​
1.5k swim / 40k bike / 10k run

Olympic Paratriathlon
1.5k swim / 40k bike / 10k run

Half Triathlon
​​1.2 mile swim / 56 mile bike /13.1 mile run

Half Aquabike​​
1.2 mile swim / 56 mile bike

Half Duathlon​​
5k Run / 56 mile bike / 13.1 mile run

Half Aquathlon
1.2 mile swim / 13.1 mile run

Half Relay
​​1.2 mile swim / 56 mile bike /13.1 mile r 

*MSE is a Woman-Owned Event Company.