14 running, fun run, and walking events in Saint Charles, Missouri

From big races to Saturday morning group runs—find running, fun run, and walking events and connect with the local endurance sports community.

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

  5k 10k 13.1 Miles Half Marathon Run Trail

  500 S Riverside Dr, Saint Charles, Missouri, 63301, United States
  OpenStreetMap Google Maps
• The "ROCKIN' RIVERFEST" 5k, 10K, Half Marathon & Fun Run! [rockinator-racing.com] [Register at runsignup.com]
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  Sat, Jul 04, 2026 at 8:00 AM

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  Welcome to the the Rockin' Riverfest 5k,10k Half Marathon and Fun Run!

  The Rockin' Riverfest is a fun, flat, fast, family friendly event taking place on Saturday Morning July 4th.

  Starting at 8:00...

  Welcome to the the Rockin' Riverfest 5k,10k Half Marathon and Fun Run!

  The Rockin' Riverfest is a fun, flat, fast, family friendly event taking place on Saturday Morning July 4th.

  Starting at 8:00 am. Race/Run/Jog or Walk starting on the Katy trail through the Shady single track trails right beside the beautiful Missouri river. Pass the water/aid station at mile 1.5 (also mile 4 and 5 for the 10K and double that for the Half)

  For registering, you not only get an awesome Race/Run/Walk through the historic district and all the action of Riverfest on the Riverfront, you get a custom finishers Rockin' Riverfest T shirt, (Shirts guaranteed to those that register by June 15) Racers Village Colas, Sports drink, Race Snacks, Professional race Timing, Instant Results, Timed Splits, Custom Bib Number, and ALL 5k, 10k and Half Marathon participants also recieve a FINISHERS MEDAL! The race also includes Free downloadable finish line pics and video. Whew! Awards Ceremony on Podiums. Water/Sports drink and pickle juice and Ice at aid stations and Racers Village. 10k and 13.1 see an additional aid stations. Music rocking at racer village!

  Cheer on your friends and family! A great way to continue your July 4th festivities. After the race, stick around and make a day of it enjoying the Historic riverfront shops, Historic St Charles and all of the Riverfest activities!

  Custom Rockin' Riverfest MEDALS to top 3 in the following age groups. (1-13,14-19, 20-29, 30-39, 40-49, 50-59, 60-69,70+) 5k,10k and Half Marathon. Splits are timed with Instant results!

  Please consider donating a few bucks to The St Charles School District Cross Country program. 100% of proceeds stay local and go to help keep kids in shoes, jackets, tarps, drinks, and general program support.

  Make a holiday of it! "Saint Charles Riverfest is the City's premier Fourth of July Festival featuring live music, great food and drinks, children's activities, a carnival and more. This year will feature a fireworks display on both evenings"

  Packet pick up Thursday, July 2 at Bike Stop Cafe 3-6pm and race morning in Racers Village 6:30-7:30 am.

  National Anthem goes at 7:56 am, you go at 8!

  Get your friends to join you and lets go!!

  3k 5k 10k Fun Run Half Marathon Run Trail Walk

  Saint Charles, Missouri, 63301, United States
  OpenStreetMap Google Maps
• St. Luke's New Town Triathlon [newtowntriathlon.com] [Register at runsignup.com]
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  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.

  Duathlon Open Water Run Swim Triathlon

  3510 New Town Lake Dr., Saint Charles, Missouri, 63301, United States
  OpenStreetMap Google Maps
• Wurst Race Ever 5K/10K [saintcharlesoktoberfest.com] [Register at raceroster.com]
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  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.

  5k 10k Run

  Katy Trail, Saint Charles, Missouri, 63045, United States
  OpenStreetMap Google Maps
• Backyard Ultra in New Town (Oct 10 8:00AM) [runsignup.com]
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  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!

  4.17 Miles Run Ultra

  3246 Rue Royale St, Saint Charles, Missouri, 63301, United States
  OpenStreetMap Google Maps
• MO' Cowbell Marathon/Half-Marathon/10K/5K [mocowbellmarathon.com] [Register at runsignup.com]
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  Sun, Nov 08, 2026 at 7:00 AM

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  Don't miss the fun and excitement of the 15th annual MO' Cowbell Race on November 8, 2026! Four events to choose from on Sunday morning, the Marathon, the Half-Marathon, 10K or the 5K. Flat & fast...

  Don't miss the fun and excitement of the 15th annual MO' Cowbell Race on November 8, 2026! Four events to choose from on Sunday morning, the Marathon, the Half-Marathon, 10K or the 5K. Flat & fast courses, perfect for beginners or those who want to set a new personal best!

  Registration for the Marathon, Half-Marathon, 10K, or the 5K includes:

  • Commemorative performance long-sleeve swag

  • One-of-a-Kind finisher medal

  • FREE and convenient parking

  • Free downloadable photos for all participants

  • Two-day Health and Fitness ExMO' Packet Pickup

  • Family friendly post race party with lots of food, fun, and music

  Registration for the Virtual Run includes:

  • 2026 One-Of-A-Kind Finisher Medal

  • Shipping and handling of your medal to you

  • Option to add on race swag

  5k 10k 21k 13.1 Miles 42k 26.2 Miles Marathon Run Virtual

  Saint Charles, Missouri, 63301, United States
  OpenStreetMap Google Maps