370 Lakeside Triathlon 2027
- Date
- Sunday, September 12, 2027
- Start time
- 6:45 AM start (Chicago)
- Location
- Saint Peters, Missouri
- Entry fee
- From $30 · goes up to $115 on Sep 6, 2027
- Included with entry
- Includes a shirt
- Fundraising
- Takes optional donations when you register
Registration is open.
We earn a small commission when you register through this link, at no cost to you. Details
Official race websiteAdd to calendar: Apple or Outlook · Google
Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| SPRINT PARA MY TEAM TRIUMPH | – | Sep 12, 20276:45 AM | $95$115 after Sep 6, 2027 | – |
| SPRINT PARA TRI | – | Sep 12, 20276:45 AM | $95$110 after Sep 6, 2027 | – |
| SUPER SPRINT INDIVIDUAL TRI | – | Sep 12, 20276:45 AM | $115$125 after Apr 13, 2027 | – |
| HALF AQUABIKE | – | Sep 12, 20277:00 AM | $165$180 after Apr 13, 2027 | – |
| HALF AQUATHLON | – | Sep 12, 20277:00 AM | $165$180 after Apr 13, 2027 | – |
| HALF INDIVIDUAL TRI | – | Sep 12, 20277:00 AM | $200$220 after Apr 13, 2027 | – |
| HALF RELAY TRI | Relay | Sep 12, 20277:00 AM | $280$290 after Apr 13, 2027 | – |
| OLYMPIC AQUABIKE | – | Sep 12, 20277:00 AM | $125$145 after Apr 13, 2027 | – |
| OLYMPIC AQUATHLON | – | Sep 12, 20277:00 AM | $125$145 after Apr 13, 2027 | – |
| OLYMPIC INDIVIDUAL TRI | – | Sep 12, 20277:00 AM | $135$155 after Apr 13, 2027 | – |
| OLYMPIC RELAY TRI | Relay | Sep 12, 20277:00 AM | $210$220 after Apr 13, 2027 | – |
| SPRINT AQUABIKE | – | Sep 12, 20277:00 AM | $115$125 after Apr 13, 2027 | – |
| SPRINT AQUATHLON | – | Sep 12, 20277:00 AM | $115$125 after Apr 13, 2027 | – |
| SPRINT COLLEGIATE TRI | – | Sep 12, 20277:00 AM | $75$95 after Sep 6, 2027 | – |
| SPRINT HIGH SCHOOL TRI | – | Sep 12, 20277:00 AM | $75$95 after Sep 6, 2027 | – |
| SPRINT INDIVIDUAL TRI | – | Sep 12, 20277:00 AM | $125$140 after Apr 13, 2027 | – |
| SPRINT RELAY TRI | Relay | Sep 12, 20277:00 AM | $195$205 after Apr 13, 2027 | – |
| 5K RUN | 5K | Sep 12, 20277:30 AM | $30$32.50 after Apr 13, 2027 | 49 |
| HALF DUATHLON | – | Sep 12, 20277:30 AM | $165$180 after Apr 13, 2027 | – |
| OLYMPIC DUATHLON | – | Sep 12, 20277:30 AM | $125$145 after Apr 13, 2027 | – |
| SPRINT DUATHLON | – | Sep 12, 20277:30 AM | $115$125 after Apr 13, 2027 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The SPRINT PARA MY TEAM TRIUMPH fee goes up to $115 on Sep 6, 2027.
Race day planning
Entry fee schedule
- SPRINT PARA MY TEAM TRIUMPH: $95 until Sep 6, then $115 until Sep 11.
- SPRINT PARA TRI: $95 until Sep 6, then $110 until Sep 11.
- SUPER SPRINT INDIVIDUAL TRI: $115 until Apr 13, then $125 until Jul 30, then $140 until Sep 6, then $160 until Sep 11.
- HALF AQUABIKE and HALF AQUATHLON: $165 until Apr 13, then $180 until Jul 30, then $190 until Sep 6, then $210 until Sep 11.
Online registration closes Sep 11, 2027, unless the race fills first.
How the price compares
At $30, entry is about 13 percent below a typical 5K in Missouri, which costs $34.50 right now.
What a typical finish looks like
A typical finisher at a 5K in Missouri runs 36:58, about 11:54 a mile, based on 246 races with published results. Women typically finish in 40:11 and men in 32:32.
Light and altitude
Sunrise on race morning is at about 6:40 AM, and the SPRINT PARA MY TEAM TRIUMPH starts at 6:45 AM. The start sits about 440 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
1000 Lakeside Park Drive, Saint Peters, MO 63376
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Typical race-day weather
Around September 12 the day usually runs from 64°F at dawn to 83°F in the afternoon, with measurable rain on about 11% of days. Cold snaps dip to 54°F and hot years reach 91°F.
Based on 76 days within a week of the date over the last 6 years, from historical weather for the start area. Not a forecast.
Race details
- Where
- 1000 Lakeside Park Drive, Saint Peters, MO 63376Map
- Course
- Road
- Start elevation
- About 440 feet
- Included with entry
- Unisex Shirt; Unisex T-shirt
- Donations
- Accepted when you register
- Distances
- 5K, Relay
- Editions
- 2027 (Sep 12, 2027), 2026 (Aug 23, 2026), 2025 (Aug 17, 2025), 2024 (Aug 25, 2024), 2023 (Aug 27, 2023), 2022 (Aug 28, 2022)
Organize this race? Add details or a correction
Plan your race
Quick answers
- When is 370 Lakeside Triathlon?
- Sunday, September 12, 2027, starting at 6:45 AM.
- How much does it cost?
- Entry starts at $30 before processing fees, and rises to $115 on Sep 6, 2027.
- When does registration close?
- Online registration closes Sep 11, 2027, unless the race fills first.
- Is the entry fee high for Missouri?
- At $30, entry is about 13 percent below a typical 5K in Missouri, which costs $34.50 right now.
- Do runners get a shirt or medal?
- Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
- Can I donate to a cause when I register?
- Yes. The registration form offers an optional donation, usually for the charity or nonprofit the race supports. The race's own page names the cause.
- What distances can I run?
- 5K, Relay.
- Where does it start?
- 1000 Lakeside Park Drive, Saint Peters, MO 63376.
From the organizers
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.