Events

50K Mashup - Terrain Trail Runners is the brainchild of the 50K Mashup, a series of 50K trail races held each year throughout the Midwest. Those who register and complete in BEST of five off the seven races, in a calendar year receive a belt buckle as well as the chance to win awards given out to the top three male and top three female finishers based on their cumulative finish times for all races in the series. Featured races include the Frozen Gnome 50K, Clinton Lake 50K, Ozark Foothills 50K, Dark 2 Dawn Night Trail Race - 9 Hours, Rockin' Rockwods 53K, G.O.A.T.z 50K, Miner 49'er 50K and Ice Age 50K. Get more information on the 50K Mashup Facebook page or at 50kmashup.
Doomsday 5K - First ever 5k trail race by Terrain Trail Runners hosted at Cliff Cave County Park, Missouri to help you start the New Year on the R.I.G.H.T kind of terrain - DIRT! Course Distance - 5K with approximately 272 feet of elevation gain. Whether you are just getting your feet wet, or should we say frozen with trail running or you are an experienced trail runner this is the race for you. ​Get more information on the Doomsday 5K Facebook page or at Doomsday5K .
The 963 Beulah Challenge - Night Trail Race is a timed event on the Beulah Loop/Trail at Greensfelder Park.
The course loop is 4.2 Miles - Elevation Gain Per Loop is approx. 397 feet and Elevation Loss Per Loop is approx. 397 feet. The course/trail is 100% single track goodness, all dirt and to keep you present there are enough rocks and roots. All distance: 9 Hours, 6 Hours and 3 Hours - Pick your poison!
​Get more information on the 963 Beulah Challenge Facebook page or at 963beulahchallenge.
 Queeny Backyard Ultra - Is a "Last Person Standing" concept. The premise is quite simple. Can you run 4.20 miles in ONE hour? And do it again and again and again.....until you are the LAST RUNNER STANDING!
AFFILIATION: Queeny Backyard Ultra is affiliated with Backyard Ultra Series!
There are currently over 150 affiliated Backyard Ultras in 43 countries and the number keeps growing!!!
Get more information on the Queeny Backyard Ultra Facebook page or at Queenybackyardultra.
Ozark Foothills Endurance Runs - Hosted each spring in Greensfelder County Park in Wildwood, Mo., this race offers 100 Mile, 100K, 50 Mile, 50K, Night-50K, Marathon and 25K distance options and is a looped course that utilizes some of the region's top-rated trails. Come run the scenic and technical terrain laying at the foothills of the gently rolling Ozark Mountain range. More than 95 percent single-track. We are proud to be a USATF Regional Association Championship race!
Get more information on the Ozark Foothills Endurance Runs Facebook page or at Ozark Foothills Endurance Runs.
Thunder Chicken 100K Stage Races - St. Louis, MO Very Own Three Day Trail Running Stage Race - Thunder Chicken 100 Stage Races is presented by Terrain Trail Runners and will be an annual gathering at Camp Wyman in Eureka, Mo, in western St. Louis County, Missouri. The event was created for many adventure seekers, reuniting for a weekend of challenging races, fellowship and the opportunity to experience some of the best trail running STL has to offer! Get more information on the Thunder Chicken 100 facebook page or at ThunderChicken100.
Friday May 2, 2025 - Sunday May 4, 2025. 
Dark 2 Dawn - Is an all-night trail run held in summer at Indian Camp Creek Park in St. Charles County, Mo. There are 10K, nine-hour and six-hour ultra options, each completed on trails that offer an exciting combination of open-field crossings and wooded single-track, consisting mainly of dirt with a bit of rock mixed in. Get more information on the Dark 2 Dawn Facebook page or at dark-2-dawn.

​Rockin' Rockwoods - Launched in 2014, this is a 53K ultra race and 1/2 Marathon held each fall at Rockwoods Reservation, 1,843 acres of state forest and conservation area in Wildwood, Mo. Starting on Muckerman Shelter at Greenfelder County Park and returns. This is a challenging course of steep grades and rolling hills with rocks, roots and creek crossings that make for a fairly technical run.  Get more information on the Rockin' Rockwoods Facebook page or at rockinrockwoods.
Babler Bongo - First ever 15k trail race by Terrain Trail Runners hosted at Dr. Edmund A. Babler Memorial State Park in Wildwood, Mo! Whether you are just getting your feet wet with trail running or you are an experienced trail runner this is the race for you. Babler Bongo 15K is a loop course connecting several trails at Babler State Park with a cumulative elevation gain of 1,350 feet. Get more information on the Babler Bongo 15K Trail Race Facebook page or at Babler Bongo 15K.
​STL Women's Trail Summit - This event is designed to bring together a group of female runners who share a passion for running, the outdoors and the promotion of an active lifestyle in their communities. The weekend event is open to all women, whether they are a novice or a seasoned trail runner. The purpose is for attendees to inspire and learn from one another, foster new connections, improve female participation in trail running, and become ambassadors of the sport. The event will not only encourage women to try trail running for the first time, but also help runners fine-tune skills and progress into harder and more exhilarating skill levels! Get more information on the STL Women's Trail Summit Facebook page or at Stlwomenstrailsummit.
​Wildwood Trail Marathons - Wildwood Trail Marathon and 1/2 Trail Marathon are a great wrap up to any runners racing season whether you run road or trail, novice or experienced the course will not disappoint. The event will be held at LaSalle Springs Middle School located in Wildwood, Mo. This is a fast and scenic course with a combination of approximately 2 miles of asphalt Hamilton-Carr Trail, gravel, dirt and 90 percent single track with enough rocks and roots to keep you present.
​Get more information on the Wildwood Trail Marathon Facebook page or at Wildwoodtrailmarathons.
​Additional races and special events are under development and will be announced soon! Interested in volunteering at one of our events? See our Volunteer page for our rewards program