Founded in 1996, the NorthShore Inline Marathon is dedicated to spreading the love of inline skating and overall fitness. Every year, thousands of athletes of all ages come to Knife River &  Duluth to participate in this one-of-a-kind event. The NSIM offers a historic route, great views, and a better community. It has been called one of the best inline marathons in the world by countless publications and has become a tradition for many. Come join us this year for our 27th year of skating.