Trail Running Calendar Ontario 2025-2026

H+P This May Be Loopy Ultra is an ultra running event held in Waterloo, Ontario, Canada, featuring a challenging 8K loop course. The event consists of two phases: the first requires participants to run 8K every hour for five hours, totaling 40K, with flexible start times within each hour. The second..

Great Mansfield Outdoors 2025 is a trail running event held at the Mansfield Outdoor Centre and Dufferin County Forest in Mulmur, Ontario. The race offers multiple distances: 50K, 25K, 10K, and 5K, with courses primarily on single-track trails featuring varying elevation gains from 130m to 1000m. Th..

The International Hallers' Run is a commemorative running event held in Niagara-on-the-Lake, Ontario, Canada, celebrating the historic ties between Poland and Canada. The race honors General Józef Haller and the Blue Army, symbolizing Polish-Canadian friendship and shared history. The event features..

The Ridge Runner is a summer trail running event held in the Hamilton area, Ontario, Canada, offering a variety of race distances including a 1K kids race, 5K, 10K, and a 21K half marathon. Participants experience rugged, scenic ridge trails with technical sections, climbs, and forested paths that s..

The Twelve Mile Creek Trail Half Marathon is an annual trail running event held in St. Catharines, Ontario, with its 36th edition scheduled for June 7, 2025. The race features a half marathon (21.1 km) and a challenging 7 km run, both incorporating scenic and historic routes along the 12 Mile Creek..

The Northumberland Run Forest Run, held in Roseneath, Ontario, offers runners a unique opportunity to explore scenic forest trails through four distinct race options. Participants can choose The Jenny, a 4-hour run on a 3K loop; The Lieutenant Dan, a challenging 7.5K loop with steep hills; The Bubba..

The Kamview / Fresh Air Trail Run will take place in Thunder Bay on Tuesday 10 June 2025.

The Look Out Trail Race, held in North Bay, Ontario, offers runners a challenging and scenic trail running experience on the Duchesnay Falls and campus trails. Participants can choose from 7km, 14km, and half marathon distances, with the course consisting of a 7km loop featuring rocky singletrack, r..

The High Noon 24Hr Trail Race & Relay is an annual endurance event held at Kamview Nordic Centre in Thunder Bay, Ontario. Participants can choose from a 24-hour solo race, a 24-hour team relay, or a 4-hour solo race for youth aged 15 and under. The course features a 3.38 km loop on scenic cross-coun..

The Rainbow Trail Run in Alliston, Ontario, is a trail running event held at Earl Rowe Provincial Park featuring a scenic 12K loop around the park. The course is mostly double-wide trails with grass, dirt, a bit of pavement, and bridge crossings over Earl Rowe Lake, including a short climb to a look..

The Trash Dash Fun Run is a trail running and walking event held in Midhurst Forest Tract near Barrie, Ontario. Participants can choose from 1km, 5km, or 10km courses that feature scenic routes along the river, hills, and even a train trestle. The event promotes environmental stewardship by encourag..

The Sunburn Solstice Trail Run takes place at Marydale Park in Mount Hope, Ontario, Canada. This unique event celebrates the longest day of the year with a 15-hour, 23-minute, and 31-second timed trail run on a scenic 3.7 km loop featuring tree-covered trails and open fields with rolling hills. Part..

The Whole Enchilada is a trail running event held at Trail Hub in Uxbridge, Ontario, known as Canada's Trail Capital. The race offers multiple distances, including a challenging 50 km course featuring significant elevation gains and technical terrain through Durham Forest, Walker Woods, and Glen Maj..

The Farthest is a unique endurance running event held in London, Ontario, Canada, where participants start together and aim to run as far away as possible from the starting point within a set time. The race offers three durations: 8 hours (The Farthest), 4 hours (Half-Farthest), and 2 hours (Quarter..

The Boomerang Trail Run is a customizable trail running event held at Batawa Ski Hill in Batawa, Ontario, Canada. Participants challenge themselves on a 7km+ looped trail featuring varied terrain including hills, rocks, roots, mud, and a single road crossing. Runners choose to complete as many loops..

The Uxbridge Run for the Diamond is a scenic running and walking event held in Uxbridge, Ontario, featuring 10K and 5K distances on winding trails and roads. Both races start and finish at Elgin Park, offering participants a picturesque course through the local landscape. The event also includes a 1..

The Kamview / Fresh Air Trail Run will take place in Thunder Bay on Sunday 22 June 2025.

The Utopia Backyard Ultra 2025, hosted by North of 89 Outdoors, takes place at the Tiffin Centre for Conservation in Utopia. This unique endurance event challenges runners to complete a 4.88-mile (6.7 km) loop every hour on the hour until only one finisher remains. The course features relatively fla..

The Sarnia Sole Burner is an annual running event held at Suncor Park/Wawanosh Wetlands in Sarnia, Ontario. It features three professionally timed loop-style races on a roughly 2.35 km fully paved course with some hills reaching about 20 meters elevation per loop. Race options include a 5K run, a 6-..

Summit 700 Trail Runs is a premier trail running event held at Blue Mountain Resort in Ontario, featuring challenging courses along the Niagara Escarpment with stunning views of Georgian Bay. The event offers multiple distances including 5K, 10K, 21K, and a new 50K Ultra and Ultra Relay, plus a 1.5K..