Trail Running Calendar Ontario 2026-2027

Trail running event in Thunder Bay organized by Thunder Bay Nordic Trails and Fresh Air with cash payment and on site number pickup. Entry is 10 dollars per person or up to 30 dollars per family; a free kids mini fun run follows.

An informal 6 km trail run on Sugarbush Vineyards' private trails as part of the Friday Night Happy Hour series, with cupless policy, water at start/finish, manual timing and on-site registration options.

Obstacle course event in Ottawa with a 6 km muddy course, all day pass with unlimited runs, finisher medal, music, photos and food trucks.

A 5K at Boler Mountain featuring 25 plus obstacles, a large foam zone, family festival features and food vendors in London Ontario.

A 7 km loop trail event in Dundas Valley offering formats from one loop to 100 miles plus timed races and on-course aid at the start finish.

A volunteer-run trail event at Hersey Lake Conservation Area offering a half marathon plus 10 km and 5 km options. Proceeds support Timmins' running community and registration carries a small online processing fee.

Trail races at Sheila McKee Park on July 29, 2026: a 5 km course with natural terrain and a 2 km kids run, timed with chip results.

Backyard ultra at Eco Park in Arva ON on August 1 2026 with a 3.36 km loop repeated twice each hour, capped at 67 runners and affiliated with Big Dog's Backyard.

Open-water swims, a swimrun and trail runs at the Welland Community Boathouse on August 2, 2026, with swims from 2K to 10K, an about 11 km swimrun and 5K and 10K trail options.

Trail event in Petawawa on August 2, 2026 offering a 2.6 km kids race, 5 km and 10 km runs, and 3×5 km relays. Registration includes a meal, event shirt, and swag; fees vary by category.

An in-person timed run in Ottawa offering 5K and 10K distances with awards and snacks. Part of registration supports OrKidstra to help children access instruments and after-school programs.

A trail running event in Thunder Bay with cash on site registration and race number pickup, a 10 dollar per person fee and a free Mini Fun Run for children afterward.

Trail marathon and half marathon in Eugenia ON along the Beaver Valley Bruce Trail, featuring steep climbs, rocky technical terrain and scenic views.

50 km team relay in 8 sections from North London to Broken Rail Brewery with proceeds supporting Ronald McDonald House Charities.

An in-person survival-style challenge at Boulevard Lake with courses for kids, adults and dogs. Distances range from 1 km to 5 km and obstacles are not disclosed in advance.

A two day trail event at Stokely Creek Lodge featuring a 1 km hill climb, 5 km and 25 km trail races, plus family activities such as a kids race, scavenger hunt, lodge dinner and a nighttime summit hike.

Eight staged days in Waterloo region combining road, trail, cross country and track into a cumulative 80 km multi-discipline event.

Trail races at Forest Lea Trails on August 9, 2026, with 10 km and 27 km on rugged singletrack, plus a free 3 km youth race for ages 15 and under.

Trail running event in Thunder Bay with cash on site registration and evening bib pickup. Start and finish are in the stadium area near Kamview Nordic Centre and a free kids mini fun run follows the main event.

The The Forest Gumpers Trail Race Series will take place in Bells Corners on Tuesday 11 August 2026. You can run 5 kilometers.