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  • Distance: 9 km from Wildwood
    Sun, Jul 19, 2026 at 6:45 AM

    In partnership with the City of Ballwin, MSE Racing is excited to host the iconic 27th annual Ballwin Triathlon. The USAT sanctioned Ballwin Triathlon is a 300 yard pool swim, 9 mile bike, and 3.4 mile run. This race is very popular and fills up to capacity almost every year. Be sure to secure your spot early.

    IT'S BACK this year: the Double Triathlon. If you are looking for a greater challenge, here’s your opportunity! Participants will complete the Ballwin Triathlon course and then head back to the pool to complete the course a second time beginning with one lap around North Pointe’s lazy river.

    For more information including, but not limited to race options, course maps, schedule of events, packet pickup/endurance expo, volunteer - signup, sponsorship info, parking, etc. Please visit - https://www.mseracing.com/ballwin-triathlon

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

    See full details
    13 Miles26 MilesRunSwimTriathlon via RunSignup
  • Distance: 9 km from Wildwood
    Sun, Aug 16, 2026 at 8:00 AM

    Kick off the last day of the Ballwin Days Festival with a competitive 5k and/or 1 mile family fun walk/run. Adults and children alike are welcome to run in either or both races. The race starts in finishes is beautiful Vlasis Park.

    For more information including, but not limited to race options, course maps, schedule of events, packet pickup/endurance expo, volunteer - signup, sponsorship info, parking, etc. Please visit - https://www.mseracing.com/ballwin-days-run

    See full details
    1 Miles3.1 Miles5kFun RunRunWalk via RunSignup
  • Distance: 9.9 km from Wildwood
    Sat, Oct 10, 2026 at 7:00 AM

    ***St. Louis Track Club members will automatically receive a $10 discount (use the same email address that you use for your member registration). Not a member? Click here to join. ***

    Come get loopy with us! The DeClue Loops Trail Race will be held Oct. 10, 2026 in scenic Greensfelder Park in Wildwood, MO.

    The DeClue Trail is a 8.2-mile loop that begins and ends near the Visitor's Center in the heart of Greensfelder Park. Runners will run counter-clockwise starting and finishing near the trailhead. There are four distance options:

    • 1 loop - 8 miles

    • 2 loops - 16 miles

    • 3 loops+ - Full Marathon

    • 4 loops - 50k

    Register early, price goes up on 8/12/2026.

    Each distance option will have awards for the top female and top male. Race Swag is included with registrations made through 9/25/26.

    RACE DAY INFO

    CUP FREE: This is a cup-free event. It is strongly recommended that you carry hydration with you on course. There will not be any cups at the stations on the course.

    PARKING: There should be plenty of parking within Greensfelder Park including near the Visitor’s Center, at Muckerman Shelter and at the gravel parking lot near the gravel road that heads to Round House.

    Race registration and headquarters will be set up at the yellow gate at DeClue Trailhead. You will likely walk on the road to get from parking to registration, so please drive slowly when moving through the park, and pay attention to traffic as you walk near race headquarters.

    PACKET PICK-UP: 50k and Marathon runners can begin picking up their packets at 6:15 a.m. at the trailhead, which is at the gravel parking lot near the gravel road that heads to Round House. 8-mile and 16-mile runners can begin picking up their packets at 7:15 a.m. at the trailhead.

    Extra shirts/swag may be available if you registered after the deadline, just ask!

    RACE START: The 50k distance and the Marathon will both begin at 7 a.m. The 8-mile and 16-mile races will begin at 8am. Race cut-off is 5pm. All runners must begin their last loop by 2:30pm.

    • Cutoffs:

    50K (18:45 pace) - 10 hours

    Marathon (22:54 pace) - 10 hours

    16 Mile (33:45 pace) - 9 hours

    8 Mile (1:07:30 pace) - 9 hours

    COURSE: 50k, 8-mile and 16-mile runners will start at the yellow gate and head down toward Round House making a left onto DeClue Trail. Marathon runners will also start at the yellow gate but will make a quick right to do a 2.4-mile loop on Dogwood Trail before heading onto DeClue. Once on DeClue runners will enjoy rolling hills and technical trails with a manned and stocked aid station at the 3-mile mark (with snacks and Tailwind) and a water station at about 6.2 mile mark just across Scenic Road. At the bottom of a nice hill runners will turn left on Eagle Valley trail, which will bring you up a nice climb to the top, behind the Visitor’s Center and across the street to the yellow gate start/finish area. Whether you are doing the loop once or 4 times, we hope you all take time to pause and enjoy all that Greensfelder Park offers.

    The course will be well marked with orange flags and signs/arrows to guide runners. You can also check out the orange DeClue Loop on the Trail Map found here: https://stlouiscountymo.gov/st-louis-county-departments/parks/places/greensfelder-park/

    TAILWIND will be served at the start/finish area and at the 3-mile aid station, and water and grab and go snacks will be available on course. Pre-packaged food will be served at aid stations and start/finish.

    DROP BAGS: We will have an area for drop bags near the start/finish for runners to access in between loops.

    POST RACE: Stick around after the race for beer/NA beer and snacks and to cheer on the rest of the runners!

    THANK YOU TO OUR SPONSORS Tailwind and 4 Hands Brewing Company

    See full details
    8 Miles16 Miles26.2 Miles32 MilesGravelRunTrailWalk via RunSignup
  • Distance: 10 km from Wildwood
    Sat, Oct 10, 2026 at 8:00 AM

    Gumbo Flats Pumpkin Run

    Benefits:

    Saturday, October 10, 2026

    Presented by:

    Join us for the 25th Annual Gumbo Flats Pumpkin Run

    The Chesterfield Regional Chamber is proud to announce its 24th Annual Gumbo Flats Pumpkin Run. This popular event will take place on Saturday, October 10, 2026 and will begin at the Chesterfield Towne Center. Hundreds of community members join us each year for the annual Chesterfield Chamber of Commerce Gumbo Flats Pumpkin Run/Walk. The 5K and 10K are out and back courses. The Chamber also hosts a half-mile Children's Fun Run for ages 10 and under. Costumes are encouraged for kids and adults alike!

    8am 5k/10k

    9am Kid Fun Run

    See full details
    5k10kFun RunKidsRunVirtual via RaceRoster
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