The 5K Foam Fest - London, ON 2026

The 5K Foam Fest in London, Ontario, guides runners around Boler Mountain on Griffith Street through a 5K obstacle-course fun run featuring foam, water, mud, and inflatables. It accommodates various fitness levels, allowing participants to walk, jog, or run, with all obstacles being optional. The event utilizes wave starts from morning to afternoon, releasing groups every 15 minutes, creating a continuous festival atmosphere rather than a single race start. The course includes over 25 obstacles, such as mud pits, extensive foam zones, and what organizers describe as the world's largest inflatable waterslide. Participants must be at least 7 years old; children aged 7 to 12 must run with a registered adult. Younger children have access to a free Kids FUN Zone with a mini inflatable obstacle course and bounce house. Spectators can enter the festival area at no charge, enjoying food, local vendors, music, and a beer garden post-race. The event also attracts teams and corporate groups, provides group discounts, and supports Make-A-Wish Canada via race-related fundraising.