Trail Running calendar near Lake Darby 2026-2027

A mission-oriented obstacle course weekend in Southern Ohio on June 27-28, 2026 featuring a 1.5-mile Battle Challenge with a live fire range, a 3k speed OCR, large water slides, mud rig obstacles and championship-level course elements.

A backyard ultra at Countryside YMCA in Lebanon, Ohio where runners complete 4.1667 mile loops each hour until one remains, with traditional last runner standing and fixed 12 hour and 24 hour options.

A Score-O orienteering event on 28 June 2026 in Camden, Ohio, hosted by the Miami Valley Orienteering Club. Participants use map and compass to collect controls within a two hour limit; maps, chip timing, and loaner compasses are provided.

A Trail Sisters approved summer trail ultra at Caesar Creek State Park offering 50 mile and 50k counterclockwise loops, cupless aid stations with food options, and 14.5 hour cutoffs. Expect single-track rollers and two manned aid stations.

Trail runs at Battelle Darby Creek Metro Park offering 5k and 10k distances and supporting FLIP's cancer prevention work. The 5k is relatively flat and family friendly while the 10k finishes with a stair climb noted by local runners.

A 5K trail race on July 12, 2026 at Stillwater Prairie Reserve in Covington, OH, as part of the Miami County Park District Trail Run Challenge. Multiple pricing and series options are offered; no dogs are allowed.

Trail races at Oakes Quarry Park in Fairborn, Ohio offering 5K, 10K and 15K courses through limestone cliffs and wooded trails. Early registration by July 10 includes a short sleeve race shirt; all finishers receive a medal.

A timed 5K at Patricia Allyn Park on July 19, 2026, with online and day of registration. Current ORRRC members run free; non members 15 and up pay $10.

Arch City XC Festival at Westerville North High School on July 25, 2026 features multiple 2 mile races for elementary, middle and high school runners plus an open race. Teams of three in middle and high school races are eligible for team sc..

A certified 5K trail run and walk at Riverbend Park in Findlay, Ohio, along the tree lined Blanchard River. Entry fees vary by age and a Competitive Division fee adds official timing and ranking eligibility.

Loop-format races at John Bryan State Park Arboretum in Yellow Springs feature a 1.1 mile loop repeated to form distances from 1.1 up to 13.2 miles, with water and aid available each loop and on-site restrooms.

A 12 hour run and ruck on a 1.52 mile paved loop at Smith Park in Middletown, Ohio. Chip timing, a stocked aid station, weight rules for ruckers, and student crafted finisher awards for several distance milestones.

Test your endurance at this military inspired obstacle course featuring mud crawls and climbing walls. Supporting the Light Foundation, the event offers a 5k trail for adults and a dedicated race for children.

A Last Runner Standing backyard ultra on a family farm in Glenmont, Ohio on August 1, 2026, with trails under old growth timber and through prairie. Free camping and parking are available near the start and finish area.

Trail races at Oakes Quarry Park in Fairborn offer 1.55 mile, 5K, 10K and 15K distances over limestone cliffs and wooded trails. Overall winners receive awards and all finishers get a medal.

The Fearless 5K in Mechanicsburg features a cross-country 5K, a 1 mile run/walk and a kids 1/4 mile on cinder track, with on-site entertainment and vendors while raising funds for youth 20 and under with serious or life threatening illness.

A 5K obstacle mud run at East Fork Motocross Park in New Vienna, Ohio on August 2, 2026. The event features mud and varied obstacles, on-course hydration and rinse-off stations, multiple ticket tiers and support for the National Breast Canc..

A women only 5K obstacle mud run at East Fork Motocross Park on August 2, 2026, focused on fun rather than competition, with spectator access, Bag Drop for a fee, and age and waiver requirements for young participants.

A two mile grass cross country meet in Mason Ohio on August 7 2026 with races for high school and open divisions. Registration opens February 3 2026 and the entry fee is $15.

A backyard ultra on a 4.167 mile loop at Alum Creek State Park near Lewis Center Ohio. Runners must complete each loop within one hour and continue hourly loops until only one runner completes an additional loop.