The "ROCKIN' RIVERFEST" 5k, 10K, Half Marathon & Fun Run!

More races nearby

• Love to Run St. Charles 5k | 10k | Half Marathon [mseracing.com] [Register at runsignup.com]

  Sat, Jun 13, 2026 at 7:00 AM

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  A unique 5k/10k/Half Marathon in the heart of downtown St. Charles with a little bonus, non-technical, shady trail off of the Katy....truly a hidden gem! Come on out and see for yourself! Enjoy these...

  A unique 5k/10k/Half Marathon in the heart of downtown St. Charles with a little bonus, non-technical, shady trail off of the Katy....truly a hidden gem! Come on out and see for yourself! Enjoy these flat and fast routes starting on the Katy Trail near Bike Stop Cafe and the Katy Depot. All the routes go through Frontier Park then north on the soft path. Beautiful river views! Post run fun at the Bike Stop Cafe including coffee and beer specials and social time on the patio!

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

  5 km from Saint Charles
  500 S Riverside Dr, Saint Charles, Missouri, 63301, United States
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  5k 10k 13.1 Miles Half Marathon Run Trail

• St. Luke's New Town Triathlon [newtowntriathlon.com] [Register at runsignup.com]

  Sat, Jul 11, 2026 at 9:00 AM

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  The St. Luke’s New Town Triathlon has become one of the most popular triathlons in the Midwest. Originally a biathlon started many years ago, the event evolved into the John Howard New Town Duathlon,...

  The St. Luke’s New Town Triathlon has become one of the most popular triathlons in the Midwest. Originally a biathlon started many years ago, the event evolved into the John Howard New Town Duathlon, and now in its current format as an ‘almost’ Olympic distance triathlon.

  This year the distances remain at a .62 mile Swim, 20 mile Bike and a 4 mile Run for the Long Course, and .3 mile Swim, 17 mile Bike and a 2 mile Run for the Sprint Course. The Kid’s Triathlon and EXPO will be held on Saturday, July 11th and the main event will be on Sunday, July 12th, 2026.

  Set in New Town, St.Charles, the venue is tailor made for a fast race. The flat course profile makes this event the perfect race to open up full bore or try the sport of triathlon for the first time.

  Sponsored by St. Luke’s Hospital and produced by Big Shark Bicycle Company/Big Shark Events.

  We encourage you to sign up early to get a jump on the competition! You can also train with us at our Open Water Swim Series running almost every Saturday from May 2nd through June 27th, 2026. There will not be swims on Memorial Day Weekend and July 4th Weekend.

  1.8 km from Saint Charles
  3510 New Town Lake Dr., Saint Charles, Missouri, 63301, United States
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  Duathlon Open Water Run Swim Triathlon

• 370 Lakeside Triathlon [mseracing.com] [Register at runsignup.com]

  Sun, Aug 23, 2026 at 6:45 AM

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  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....

  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.

  7.1 km from Saint Charles
  370 Lakeside Park, Saint Peters, Missouri, 63376, United States
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  5k Aquabike Aquathlon Cycling Duathlon Run Swim Trail Triathlon

• Wurst Race Ever 5K/10K [saintcharlesoktoberfest.com] [Register at raceroster.com]

  Sun, Sep 27, 2026 at 8:30 AM

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  Lace up your sneakers and grab your lederhosen because the Saint Charles Oktoberfest Wurst Race Ever 5K and 10K is taking over Historic St. Charles on Sunday, September 27, 2026. Whether you are...

  Lace up your sneakers and grab your lederhosen because the Saint Charles Oktoberfest Wurst Race Ever 5K and 10K is taking over Historic St. Charles on Sunday, September 27, 2026. Whether you are aiming for a personal best or just here for the festive atmosphere, this event brings the spirit of Munich right to the cobblestone streets.

  The course winds through the scenic views of Frontier Park and the Missouri River, offering a perfect backdrop for a morning run. You can choose your distance and then stick around to enjoy the festivities that make this weekend a local staple.

  Participating in this race does more than just get your heart rate up. All proceeds go toward supporting the Saint Charles Oktoberfest and the St. Charles Regional Chamber Foundation. These funds play a critical role in workforce development and talent attraction initiatives throughout the county, helping to build a stronger professional community for everyone.

  Registration includes:

  • Official race shirt

  • Finisher medal

  • A great reason to treat yourself to a pretzel afterward

  Register now to secure your spot in the most spirited race of the year. Let's hit the pavement and make an impact on our local workforce together.

  4.7 km from Saint Charles
  Katy Trail, Saint Charles, Missouri, 63045, United States
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  5k 10k Run

• Backyard Ultra in New Town (Oct 10 8:00AM) [runsignup.com]

  Sat, Oct 10, 2026 at 8:00 AM

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  The Second Annual Backyard Ultra marathon in New Town, Missouri will be held October 10th, 2026. Event registration will start at 7:00 AM, and the race will begin at 8:00 AM. The event will consist...

  The Second Annual Backyard Ultra marathon in New Town, Missouri will be held October 10th, 2026. Event registration will start at 7:00 AM, and the race will begin at 8:00 AM. The event will consist of a 4.17 mile loop and runners will have up until the next hour to be back in time to start the next loop. Registration for the event is $25 to cover costs, but to run each loop you must put a dollar into a race jar. The winner of this last person standing race will receive half of the jar, while the other half will be donated to MSMDS charity. If you just want to come run some laps but can’t start at 8:00 AM, we would love to see you come out and try to PR at any hour time slot. (you just won’t be able to win the overall money jar prize.) Each participant that completes a lap will be given a custom NewTown Ultra DNF token.

  Race location will be at the amphitheater in New Town in Saint Charles, Missouri. https://maps.apple.com/place?coordinate=38.836652,-90.494863&name=Marked%20Location&map=h

  This is where registration and start of each lap will be. There is an area with bathrooms and where runners can set up their area in between laps for refueling, relaxing, and making friends. There are multiple restaurants, coffee shop, ice cream shacks around that will have food available as well. The race will have volunteers staffed until 12pm Sunday, October 11th which would mean ~116.8 miles! If two runners are still going at that time, accommodations will be made to keep the race going since we would love to see two make it that far!

  With the $25 covering the cost of coins and other race related expenses, we ask you consider donating to a cause that is near and dear to our hearts. Multisystemic Smooth Muscle Dysfunction Syndrome (MSMDS), an ultra-rare genetic disease affecting only 70 patients worldwide, mostly children.

  Braxley is who we are running for and she is two of our racers amazing warrior niece. Braxley is a fun, loving and sassy 3 year old. She enjoys coloring, tumbling and playing with her dogs, brother and cousins. Braxley suffers from a rare disease called Multisystemic Smooth Muscle Dysfunction Syndrome, or MSMDS for short. A life threatening condition caused by mutations in the ACTA2 gene.

  MSMDS is an ultra-rare genetic disorder that affects the smooth muscle cells throughout the body--including those in the vascular, respiratory, gastrointestinal, cardiovascular and urinary systems. Children born with ACTA2-related MSMDS often face serious, debilitating complications such as early-onset strokes, aortic dilation with risk for dissection or rupture at a young age, periventricular white matter lesions, chronically dilated and fixed pupils, chronic interstitial lung disease, hypotonic bladder and recurrent urinary infections. Many do not survive past early childhood. For those who do, the journey is filled with constant medical intervention, high-risk surgeries and a deep uncertainty about the future.

  There is an amazing team of doctors and researchers working on gene therapy to help patients like Braxley. They were prepared to start a clinical trial in February of 2026. Due to cuts from the federal government, the team never received the grant to move forward. They're now in limbo of waiting on if/when they will receive the grant. Because of how quickly the disease is progressing for Braxley, she does not have the time to sit around and wait. There's hope that there's help out there, but it's an arms length away. We need champions who will support funding for research. Please consider becoming one of those champions. The lives of children and families living with ACTA2 related MSMDS depend on it.

  https://www.zeffy.com/en-US/donation-form/ali-and-nate-hodson

  Please sign up and tell your friends that we would love to see the run one or 21 loops and push themselves to new heights!

  2 km from Saint Charles
  3246 Rue Royale St, Saint Charles, Missouri, 63301, United States
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  4.17 Miles Run Ultra