Trail Running calendar near Griffith 2026-2027

A timed 10-hour endurance run at Bluhm County Park on August 29, 2026 where runners repeat a 4 to 4.1 mile trail loop with hourly cutoffs, chip-based prizes, a limited-edition shirt, and a wooden medal.

A half marathon and 10k at Danada Forest Preserve in Wheaton on crushed limestone trails, finishing around the horse race track. USATF certified courses with chip timing, pacers, finisher medals, shuttle parking and packet mailing options.

A timed urban ultra at Horner Park with 3, 6 and 12 hour options on a short paved loop, hourly challenges, a single aid station, and two or four person relay teams.

Cornell Days 5k and 1 Mile Fun Run/Walk is a family friendly event at Clinton Keith Mills Memorial Park with an out and back county road course and a postrace breakfast cookout.

An obstacle course race at Indiana Dunes National Park on September 13, 2026, featuring 10k, 5K and a K9 3.1-mile event. The course uses varied landscapes to reflect terrains associated with military service.

Midwest OCR in Marseilles, Illinois features 5K and 10K obstacle courses, ruck options, a kid's loop, and a multi-lap Bearded Challenge, with finisher shirts, medals, and professional photos included; elite divisions award podiums and cash..

A loop-based running event at Limestone Park offering 8 hour and 4 hour races on a 1.65 mile course with mixed crushed limestone and asphalt terrain. Scoring is by completed loops and proceeds support local organizations.

A multi-distance running and walking event at Moraine Hills State Park offering 5K, 10K and half marathon options in person and virtually during September 2026, with courses on crushed limestone trails and support stations along the routes.

Experience the Bloomingdale Trail Run in Chicago featuring a timed 5K and short dashes for youth. This annual event offers a variety of distances on an urban trail for a family friendly day of running.

Timed 6 hour and 12 hour events on a two mile loop along Evanston’s lakefront and the Northwestern University campus. The course has paved and crushed gravel sections, two aid stations, public fountains, and handcrafted finisher awards.

Multi-distance trail event at Tryon Farm featuring a 4 mile loop used for 2 mile, 4 mile, 8 mile, 25k and 50k races. The course mixes grassy fields and single track trails with basic aid and parking across the street.

A community 5k run and walk hosted by the Lockport Fire Foundation on October 4, 2026 at Hassert Park in Lockport, IL. Entry includes a t-shirt and finisher medal for registered participants present on race day.

A community 5K in Flossmoor with a parallel virtual 5K that raises funds and collects goods to support local families experiencing hidden homelessness and provide school supplies for homeless children.

Multiple endurance trail distances on a flat, crushed gravel section of the Des Plaines River Trail, starting and finishing at Half Day Forest Preserve in Lake County, Illinois. The marathon is a Boston Qualifier and the event runs each Oct..

Trail run at Saw Wee Kee Park on October 17, 2026, over soft, twisting trails with variable footing. Bib-timed waves, part of a four-race series with collectible medal pieces and seasonal swag.

Timed 6, 12 and 24 hour events on the dirt and grass trails of St. Patrick's County Park in South Bend with on-site overnight amenities and proceeds donated to the ALS community.

Trail race in Crystal Lake, IL on October 17, 2026 offering 5 Miler and 10 Miler options on single track trails with bonus mileage. Carry your own hydration; finishers receive a race shirt and a skeleton medal.

A Halloween-themed trail event in Pingree Grove, IL on October 23, 2026 with multiple 5 km heats, haunted sets and animatronics, plus a costume contest, bonfire and food; spectator fee $10, free parking.

A looped trail event offering 50K, 25K, and a 5-mile option on mostly single-track terrain with staffed aid stations and an organizer focus on community and inclusion.

Howloween 5K in Schaumburg is a chip timed 5K run or walk at Busse Woods that supports animal shelters. Pets may join without registration and a virtual participation option is available.