Tamarack Health WhistleStop Marathon, Half-Marathon, 5K & 10K 2026

The Tamarack Health WhistleStop races take place on an abandoned railroad bed near Ashland, Wisconsin, offering a distinct atmosphere compared to typical road races. This fall race series includes a marathon, half marathon, 10K, and 5K, allowing participants to select their preferred distance, from a short run to the full marathon. The marathon is among Wisconsin's larger events, and its fast course attracts runners aiming for a personal best or a Boston Marathon qualifying time. The primary course is point-to-point, crossing northern Wisconsin's countryside via a rail-trail, passing through farmland, dairy farms, and tranquil rural areas. Hundreds of runners travel from across the United States. The variety of distances accommodates beginners, casual runners, and seasoned marathoners during the same weekend. The event has been held annually for over twenty years, and its WhistleStop name aligns with the railroad-bed course that forms the race's core.