2026 Demi-Marathon Lachine

The 2026 Demi-Marathon Lachine returns to Lachine, Quebec on Sunday, October 18, 2026 for a full day of road racing along the Lachine Canal National Historic Site. Distances run from a 1K and 2K through 5K and 10K up to the flagship 21.1K half marathon, plus a 10K Nordic walk for anyone who wants the longer canal route at a walking pace.

It's a strong late-season pick in Greater Montreal: the 5K, 10K, and 21.1K courses are Athletics Canada certified, registration includes an official T-shirt and finisher medal, and the day wraps at Parc René-Lévesque. Start areas sit along Chemin du Canal and at the park entrance depending on distance.

For runners comparing fall options, it sits comfortably among half marathons in Montreal and other road races in Montreal.

The course follows a loop along the Lachine Canal National Historic Site. Runners start on Boulevard St-Joseph / Chemin du Canal and travel through parks including Summerlea, Stoney Point, Fort-Rolland, Saint-Louis, and Noël-Spinelli before finishing at Parc René-Lévesque.

The 10K starts at 8:00 a.m. and the 21.1K at 8:45 a.m. from Chemin du Canal. The 5K starts at 11:30 a.m., the 1K at 12:15 p.m., and the 2K at 12:30 p.m., with shorter distances starting near the Parc René-Lévesque entrance.

Aid stations with water and sports drink are provided on the 5K, 10K, and 21.1K. Strollers are allowed on the 10K, 5K, 2K, and 1K only. The half marathon is for participants 18 and older on race day.

• Sunday, October 18, 2026 in Lachine along the Lachine Canal
• Distances: 21.1K, 10K, 5K, 2K, 1K, plus 10K Nordic walk
• Athletics Canada–certified 5K, 10K, and 21.1K courses
• Finish festival at Parc René-Lévesque
• Official T-shirt and finisher medal included with registration
• Water and aid stations on the 5K, 10K, and 21.1K courses
• Pace bunnies for the 21.1K (1:45, 2:00, 2:15)