Join us for the 6th annual USAT sanctioned 370 Lakeside Triathlon! Enjoy the flattest, fastest course starting in beautiful 370 Lakeside Park! Enjoy a beach start, amazing country roads in St. Charles County, and a run that includes the park trails. We offer a variety of race options from a 5k run, super sprint or sprint for newbies, up to half distance along with duathlon, aquabike and aquathlon options!
For more information including course maps, schedule of events, race options, volunteer signup, etc. Please visit - https://www.mseracing.com/370-lakeside-triathlon
All athletes MUST show a Photo ID and pick up their own race packet, NO EXCEPTIONS.
Aug 23, 2026
Distance — SPRINT PARA MY TEAM TRIUMPH
Type — Running
06:45
$95.00
Aug 23, 2026
Distance — SPRINT PARA TRI
Type — Running
06:45
$95.00
Aug 23, 2026
Distance — SUPER SPRINT INDIVIDUAL TRI
Type — Running
06:45
$115.00
Aug 23, 2026
Distance — HALF AQUABIKE
Type — Running
07:00
$165.00
Aug 23, 2026
Distance — HALF AQUATHLON
Type — Running
07:00
$165.00
Aug 23, 2026
Distance — HALF INDIVIDUAL TRI
Type — Running
07:00
$200.00
Aug 23, 2026
Distance — HALF RELAY TRI
Type — Running
07:00
$280.00
Aug 23, 2026
Distance — OLYMPIC AQUABIKE
Type — Running
07:00
$125.00
Aug 23, 2026
Distance — OLYMPIC AQUATHLON
Type — Running
07:00
$125.00
Aug 23, 2026
Distance — OLYMPIC INDIVIDUAL TRI
Type — Running
07:00
$135.00
Aug 23, 2026
Distance — OLYMPIC RELAY TRI
Type — Running
07:00
$210.00
Aug 23, 2026
Distance — SPRINT AQUABIKE
Type — Running
07:00
$115.00
Aug 23, 2026
Distance — SPRINT AQUATHLON
Type — Running
07:00
$115.00
Aug 23, 2026
Distance — SPRINT COLLEGIATE TRI
Type — Running
07:00
$75.00
Aug 23, 2026
Distance — SPRINT HIGH SCHOOL TRI
Type — Running
07:00
$75.00
Aug 23, 2026
Distance — SPRINT INDIVIDUAL TRI
Type — Running
07:00
$125.00
Aug 23, 2026
Distance — SPRINT RELAY TRI
Type — Running
07:00
$195.00
Aug 23, 2026
Distance — 5K
Type — Running
07:30
$30.00
Aug 23, 2026
Distance — HALF DUATHLON
Type — Running
07:30
$165.00
Aug 23, 2026
Distance — OLYMPIC DUATHLON
Type — Running
07:30
$125.00
Aug 23, 2026
Distance — SPRINT DUATHLON
Type — Running
07:30
$115.00
These values represent the 3-year monthly averages for August in Saint Peters.
St. Peters is a city in St. Charles County, Missouri, United States. The population was 57,732 at the 2020 census, making it the tenth-largest city in Missouri. It is a northwestern suburb of St. Louis.
Read more launchExplore other exciting events happening in this same region.
location_on St Charles, Missouri, US
calendar_today Mar 08, 2026
Hand-picked events we think you’ll love.
Nov 21, 2026
The RUN Manatee 5k series offers THREE adventures to celebrate ONE community. Participants will discover Manatee County…
Read more
Nov 28, 2026
Join us for the annual Turkey Trails 5k/10k! A fun, Thanksgiving-themed event that is perfect for the whole family.The…
Read more
Dec 13, 2026
Join us for the annual Candy Cane Course 5k/12k! A fun, Christmas-themed event that is perfect for the whole family.Th…
Read more
Mar 21, 2027
WE ARE NOW OFFERING AN AQUABIKE DIVISION! Triathlon Information:Join us for the annual Space Coast Triathlon, held in …
Read more
