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Youth Jr. Age 7-10
100m swim | 1k run

Youth Sr. Age 11-15
200m swim | 2k run
Race Options
Race Options


Free Youth USAT Membership (email for the coupon code before you register), Swim cap, swim bag, live race results, finishers medal and postrace snacks!


Now it's the kids turn to shine!

Foss Swim School Kids Splash and Dash


MSE Racing is proud to announce that we will be hosting a fun USAT sanctioned Kids Splash & Dash Youth Aquathon on Saturday, August 26th the day before the 370 Lakeside Triathlon. The race takes place at the same location as the 370 Lakeside Triathlon in beautiful 370 Lakeside Park in Saint Peters. The Foss Swim School Kids Splash & Dash is the chance for our youngest athletes to get the ultimate race experience!

RACE DAY & Finish Line Fun


370 Lakeside Park, Corporate Pavilion

1000 Lakeside Park Drive

Saint Peters, MO 63376 

PARKING: There is a variety of parking around 370 Lakeside Park. The closest and most advantageous parking is the large parking lot directly next to the 370 Lakeside Corporate Pavilion. Please do not park on any grass areas in the park. 

TIME: 10:30am – 2::30pm


10:30am - 11:45am - Onsite Packet Pickup

12:00pm – Athletes line up along the beach area near the Corporate Pavilion along the 370 Lakeside Park beach area with their age group which is indicated by swim cap color. The 11–15-year-old Youth Senior Age division will start first followed by the 7-10 year-old Youth Junior Age division. 

Pre-race announcements.

12:15pm – Swim starts begins!

FINSIHLINE FUN: Snacks, drinks and music under the pavilion! Invite family and
friends to cheer you on!

AWARDS: Listen for announcements. We will do the awards as soon as the majority
have finished. Awards will be given to the top 3 males and females in each division:

  • Ages 7-8

  • Ages 9-10

  • Ages 11-12

  • Ages 13-15


Note: Racing age is a child’s age at the end of the year (12/31/23)


This is a USAT sanctioned event. All participants must be a USAT Youth member. By participating in this event you qualify for a FREE USAT membership. To obtain the coupon code for your free membership please email  

There is NO rain date, We Go Rain or Shine. In case of inclement weather,
management reserves the right to cancel/alter/modify the race/course for safety
concerns. In any case there will be No Refunds of race entry fees. Each athlete must
accept any such risk of their entry fee paid. There is no complementary race entry to a
future race. All monies collected are used to develop and produce the event, including
all race supplies, staffing, and administration. We pledge to make every effort to
produce a fair, safe, and exciting event for all. Any decision we make to go forth with the
race is based on the overall event safety. We have a strict NO REFUND policy.



There may be a photographer on site capturing pictures of the event. Since this is a public event, we reserve the right to post photos on our social media or agency website. Photos may also be used in promotional materials.





370 Lakeside Park, Corporate Pavilion

1000 Lakeside Park Drive

Saint Peters, MO 63376 

TIME: 12:00pm – 4:00pm 


Allow time to visit the MSE Racing 370 Lakeside Triathlon Endurance Expo and enjoy all the park amenities for additional family fun – 

  • vendor booths 

  • athlete's lounge under the purple tent to participate in some onsite Yoga 

  • yard game section 

  • food trucks 

  • splash pad 

  • fishing 

  • small playground 

  • rentals - kayaks, paddle boards, paddle boats and bikes 

ENDURANCE EXPO & Lakeside Park Amenities
USAT Triathlon Splash and Dash Logo_FC.png
bike stop cafe logo.jfif
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