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.
Learn more about the host city, 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.
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location_on Saint Peters, Missouri, US
calendar_today Aug 22, 2026
location_on St. Charles, Missouri, US
calendar_today Aug 08, 2026
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