road · Super sprint individual tri · Sprint individual tri · Sprint para tri · and 18 more

370 Lakeside Triathlon

Saint Peters, MO Sunday, September 12, 2027 Unclaimed listing
Build your free race-day pace plan
DistancesSuper sprint individual tri, Sprint individual tri, Sprint para tri, Sprint collegiate tri, Sprint high school tri, Sprint para my team triumph, Sprint aquathlon, Sprint aquabike, and 13 more
Surfaceroad
USATF certifiedNo
Boston qualifierNo

From the race's RunSignup listing, last updated September 21, 2026.

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Race-day weather

What the weather did on September 12 in each of the last 4 years, measured at St Charles Elm Pt, 6.3 miles from Saint Peters.

81°Ftypical high
63°Ftypical low
2 of 4years with rain
YearHighLowRain
202684°F68°Fnone
202590°F62°Fnone
202378°F63°F0.17 in
202274°F53°F0.11 in

Daily highs and lows, not start-line temperatures: most races start in the cool of the morning, closer to the low. Source: NOAA National Centers for Environmental Information, GHCN-Daily.

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Hotels and rentals in and around Saint Peters, MO.

Preset to race weekend, Sep 11 – 13.

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  • 5K
  • ≈58°F on September race mornings
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