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  • St. Louis Triathlon [mseracing.com] [Register at runsignup.com]

    Sun, Jun 28, 2026 at 6:15 AM

    Description

    In partnership with St. Louis County Parks, the beautiful City of Maryland Heights, and MoDOT - MSE Racing is proud to return the fastest, most electrifying triathlon in the Midwest area on Sunday,...

    In partnership with St. Louis County Parks, the beautiful City of Maryland Heights, and MoDOT - MSE Racing is proud to return the fastest, most electrifying triathlon in the Midwest area on Sunday, June 28th, 2026. Taking place at the scenic and local favorite, Creve Coeur Park, the St. Louis Triathlon is ideal for both veterans, and those new to the multi-sport experience. A race like no other, with YOUR experience as our primary focus. At the Lou Fusz Subaru St. Louis Triathlon every athlete is a champion!

    For more information including course maps, schedule of events, volunteer signup, sponsorship information, race results, etc. Please visit - Lou Fusz Subaru St. Louis Triathlon | MSE Racing

    29.7 km from O'Fallon
    13725 Marine Ave, St. Louis, Missouri, 63146, United States
    OpenStreetMap Google Maps

    Duathlon Run Triathlon

  • MTC Zilla Tri [mtczillatri.com] [Register at runsignup.com]

    Sun, Jul 12, 2026 at 8:00 AM

    Description

    Welcome to the 3rd annual MTC Zilla Tri Sprint Triathlon WITH NEW EXPANDED YOUTH SHORT SPRINT AGE GROUPS! This triathlon is a great event for all ages, 10 and up, beginners and seasoned athletes....

    Welcome to the 3rd annual MTC Zilla Tri Sprint Triathlon WITH NEW EXPANDED YOUTH SHORT SPRINT AGE GROUPS! This triathlon is a great event for all ages, 10 and up, beginners and seasoned athletes. Event hosted by the Metro-Tri Club. Race begins in the beautiful Bolm-Schuhkraft Park in Columbia, Illinois.

    The SPRINT event, open to ages 14 and up, begins with a 300 meter serpentine swim in Columbia Bath and Tennis pool. The 11.2-mile bike course has mostly flat roads with one challenging hill, and railroad crossing (time not adjusted for stoppage at train track). The bike is non-draft legal. The 5K run course will take you through a neighborhood, onto the trail, and will have plenty of shade.

    The YOUTH SHORT SPRINT, open to ages 10-17 years, will begin with a 200 meter serpentine swim in Columbia Bath and Tennis pool. The 6 mile bike course has mostly flat roads with one challenging hill, and railroad crossing (time not adjusted for stoppage at train track). The bike is non-draft legal. The 2 mile run course will take you through a neighborhood with plenty of shade.

    *NOTE: Athletes aged 14-17 may choose to race in either the Short Youth Sprint OR the Full Distance Sprint if they are seeking a greater challenge.

    Triathlon is USAT sanctioned. USAT rules require bar ends to be plugged. Drafting rules apply. USAT officials will be on course.

    Be sure to register by July 13, 2026 to guarantee a t-shirt in your size.

    Online Registration ends August 1 at 12:00 pm.

    Packet Pick-up:

    Saturday, August 1, 8:00 am - 12:00 pm and Race Day 5:30 - 6:45 am, McDonnold Blvd, in Bolm-Schukraft Park, Columbia, IL.

    All athletes must pick up their own packet, NO EXCEPTIONS. Photo ID and USAT membership card are required. If you are not a USAT member you will need to purchase an annual membership or 1-day pass during registration. If you do not have your USAT membership card, you will be required to purchase a 1-day pass.

    Transition will open at 5:30 AM and close at 6:45 AM. Mandatory meeting with USAT official 6:45AM. Race begins at 7:00 AM

    Sprint Course Maps:

    Youth Short Sprint Course Maps:

    Awards:

    In the SPRINT Race, Top Male and Female Finisher Awards will be given, as well as Top 3 age-division finishers for Male and Females: 14-15, 16-17 18-19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54,55-59, 60-64, 65-69, 70-74, 75-79, 80-84, 85 and older.

    In the YOUTH SHORT SPRINT, awards will be given to the Top 3 age-division finishers for Male and Female: 10-11, 12-13, 14-15, and 16-17.

    In the case of lightening the swim will be canceled and replaced with a 1k run for the Sprint Distance, 0.5 mile run for the Youth Short Sprint. In the case of severe weather the event will be canceled, no refunds/transfers. The race director(s) reserve the right to cancel or modify the race due to adverse conditions that make the race unsafe. In the event the race is canceled, it will not be rescheduled, and there will be no refunds. Awards and swag will not be mailed.

    33 km from O'Fallon
    1200 N Evergreen Lane, Columbia, Illinois, 62236, United States
    OpenStreetMap Google Maps

    8.1 Miles 14.5 Miles Run Swim Trail Triathlon

  • Tour de Kirkwood Triathlon [bigshark.com] [Register at runsignup.com]

    Sun, Jul 26, 2026 at 7:30 AM

    Description

    This triathlon is a welcoming and fun experience that introduces the sport to first timers and developing triathletes. We time and score this event- but don't have awards in the traditional sense-...

    This triathlon is a welcoming and fun experience that introduces the sport to first timers and developing triathletes. We time and score this event- but don't have awards in the traditional sense- everyone who participates wins. The Tour de Kirkwood Title Sponsor- Heather G. Johnson Realty will be providing a post race lunch by Blues Fired Pizza's food truck! Come for the race and hang out and cheer people as they finish!

    46.7 km from O'Fallon
    111 S Geyer Rd, Kirkwood, Missouri, 63122, United States
    OpenStreetMap Google Maps

    Triathlon

  • The Inkwell Clayton Kids Triathlon [bigshark.com] [Register at runsignup.com]

    Sun, Aug 16, 2026 at 8:00 AM

    Description

    The City of Clayton, Inkwell, The Center of Clayton and Big Shark Bicycle Company are proud to announce the 11th Annual Inkwell Clayton Kids Triathlon. This year's event will take place at Clayton...

    The City of Clayton, Inkwell, The Center of Clayton and Big Shark Bicycle Company are proud to announce the 11th Annual Inkwell Clayton Kids Triathlon. This year's event will take place at Clayton Shaw Park Outdoor Pool, Shaw Park and the new GRG Centennial Greenway. This fun and twisty course will introduce kids ages 7- 14 to the sport of triathlon. New for this year- following the completion of the younger age groups we will be holding a free Fun Run on the @1 mile run course.

    40.8 km from O'Fallon
    27 S Brentwood Blvd, Clayton, Missouri, 63105, United States
    OpenStreetMap Google Maps

    Fun Run Kids Run Triathlon

  • Carlyle Lake Triathlon [mseracing.com] [Register at runsignup.com]

    Sun, Sep 20, 2026 at 6:45 AM

    Description

    In partnership with Carlyle Lake, the City of Carlyle, IL, and the US Army Corps of Engineers, MSE Racing is proud to bring to you the 6th Annual Carlyle Lake Triathlon.

    Experience an exciting beach...

    In partnership with Carlyle Lake, the City of Carlyle, IL, and the US Army Corps of Engineers, MSE Racing is proud to bring to you the 6th Annual Carlyle Lake Triathlon.

    Experience an exciting beach start for the beautiful Carlyle Lake swim, transitioning to a flat, scenic bike course over the plains of Illinois. The run takes you on rolling country roads to finish coming over the spillway at the end with a view of the largest man-made lakes in Illinois. With multiple distance options to choose from, there is sure to be an event for every type and skill level of triathlete! You'll revel in the famously flat and fast roads of Carlyle, the view over the spillway of the dam, and much, much more!!

    For more information including course maps, schedule of events, race options, volunteer signup, etc. Please visit - https://www.mseracing.com/carlyle-lake-triathlon

    All athletes MUST show a Photo ID and pick up their own race packet, NO EXCEPTIONS.

    45.1 km from O'Fallon
    801 Lake Road, Carlyle, Illinois, 62231, United States
    OpenStreetMap Google Maps

    Duathlon Run Swim Triathlon

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