The Défi des Collines is a running event held in Sainte-Catherine-de-Hatley, Quebec, offering distances of 5.5 km, 11 km, 15 km, and 30 km. It serves as an excellent test to assess readiness for fall marathons and half-marathons.

Participants enjoy a well-supported race with water stations, medical services, and shuttle options for longer distances. The event also emphasizes community support through food donations and clothing drives.

• Road race courses of 5.5 km, 11 km, 15 km, and 30 km

• Bib pickup on August 30, 2025, from 7:00 AM to 8:30 AM at the Centre communautaire Sainte-Catherine-de-Hatley
• On-site registration available on race day (cash only)