370 Lakeside Triathlon
Updated
Sunday, September 12, 2027, first start 7:30 AM, in Saint Peters (1000 Lakeside Park Drive). Distances: 5K. Entry from $30; the 5K goes from $30 to $32.50 after April 13.
Course and race notes
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.
In the organizer's words, from the race's own listing.
Race details
Date
Sunday, September 12
2027 · in 309 days
Start time
7:30 AM
Earliest wave
Course
Trail
Dirt or single-track on at least part of the course
Distances
5K
Price
$30
Plus the platform's processing fee
5K goes up after Tue Apr 13 (in 157 days)
Registration
Open
Online signup closes Sat Sep 11 (in 308 days)
Opened Sep 9, 2026
Race day in Saint Peters
Weather
82° / 59°F
Typical high and low for September 12, with a 23% chance of rain.
NOAA 1991–2020 climate normals, St Charles Elm Pt, MO (2.6 mi away). Averages, not a forecast; a forecast appears here a week out.
Daylight
6:39 AM – 7:17 PM
Sunrise and sunset on Sunday. The first start is 51 minutes after sunrise.
Calculated for the race location.
Near the start
Pin from the race's listed address. The start line can differ; check the race website for the course map. Directions
Parking
- Blueway Parking0.3 mi
9 public lots and garages within 0.6 mi.
Nearest public restroom: 0.3 mi from the start.
Distances are straight-line from the race address. Check the race website for official parking.
Plan your trip
For the night before, Sat Sep 11
Where to stay
See all places to stay near Saint Peters, MO ↗
Prices checked November 4, 2026 and can change. Confirm on the booking site before you book. We may earn a commission at no cost to you.
Trip cost
Add what you'll actually pay. It stays in this browser.
Total $0
Race entry starts at the lowest listed price, before the platform's fee.