Trail Running calendar near Potosi 2026-2027

A five-race trail series at Castlewood State Park in Ballwin, MO, with distances from 4K to 8K across summer dates. Series scoring uses each runner's best four races; series entrants receive a shirt and commemorative medal.

Races at Frontier Park in St Charles use the Katy Trail and riverside single track trails and include 5K, 10K, 13.1 mile half marathon and a timed 5K fun run. Race village amenities include chip timing, medals, shirts and aid stations.

Multiple distances run along the Katy Trail and riverfront trails in Frontier Park, St Charles on July 4, 2026. The event includes finisher medals, T-shirts, timed results, aid stations, music and awards for age groups.

A 4 mile off-road trail race at Good News Brewery in Defiance, MO on July 11, 2026, with a post-race party, free bagels and beer, and a long sleeve tech shirt. Registration opens February 18 and closes May 1 with a $50 fee.

A 6 hour endurance race in Devils Elbow, MO on July 18, 2026. Shaded gravel loops, aid stations, costume and distance prizes, and donations benefit Operation Christmas Child.

Timed 3 and 6 hour loop races at Route 66 State Park near Eureka, MO on July 18, 2026. Measured 2.425 mile loop with a 0.333 mile short lap, cupless aid station, night running and finisher medal plus custom socks.

A loop-based trail event in Foristell, Missouri on August 1, 2026, where runners repeat a 3.1 mile (5K) loop each hour and may stop after any completed loop. Results combine times for all completed loops to determine rankings.

A three-week night trail series in Wildwood, MO featuring three 10K races with increasing climb per mile. Organized by Terrain Trail Runners, the series includes finisher stickers, post-race refreshments, awards credits, and a cup-free sust..

Timed 6 hour and 3 hour endurance runs on a 1.01 mile loop at Watershed Nature Center in Edwardsville, IL, with a mixed crushed limestone and pavement surface. Field limited to 120; proceeds support the nature center.

Bad Dawg Ultra is a multi distance endurance event August 15–16, 2026 near Waynesville, Missouri, run on a 10 mile out and back loop through Ozark gravel and hills. Distances range from 12 miles to 100 miles with aid stations and on site ca..

A two-person relay on the Ozark Trail combining trail running, mountain biking and paddling through the Mark Twain National Forest, with two course lengths, aid stations and paddle equipment provided.

A loop based trail event at Cliff Cave Park on August 22, 2026, featuring a marked 3.1 mile loop along the River Bluff Trail with packed dirt, singletrack, and bluff views. Runners may repeat laps to reach distances from 5K to 50K.

A continuous 3.1-mile loop trail race at Cliff Cave Park with rolling hills, river overlooks, and a fully stocked aid station each lap. Options are 40 or 50 miles with a 12-hour cutoff and designated crew and pacer access.

Trail races at the Lewis and Clark Trailhead near St Charles include a 13.1 miles half plus separate 8 miles and 5 miles loops. Aid stations offer water and Tailwind and each runner receives a reusable cup at packet pickup.

Trail runs and a ruck event at Queeny Park on September 5, 2026. Events include chip timing, lap aid stations, finisher medals, age group awards, event shirts and backpacks.

An open 5K running event in Forest Park, Saint Louis, on 12 September 2026 with a $15 entry fee; the festival also features high school cross country competition and open registration from 23 April 2026.

Rockin' Rockwoods is a trail event in Greensfelder County Park on September 26, 2026. It offers a 53K, a half marathon and a 13.1 mile ruck over technical single track with stocked aid stations and a 10 hour time limit.

Run the scenic Katy Trail with 5k 10k or half marathon options followed by a celebration at The Wine Cafe featuring whiskey sampling coffee and local donuts in St. Charles.

A women only weekend at Cuivre River State Park with camping, hiking, night trail runs and outdoor clinics organized by Terrain Trail Runners. The free event is capped at 20 participants and hosting costs are shared among attendees.

Multi distance weekend in Waynesville MO with 5k 10k and half marathon courses along the Roubidoux and views of Frog Rock. A multi race challenge awards a bonus medal and child entries are available with a registration code.