The NorthShore Inline Marathon, Inc. is a non-profit organization that produces six events every September for the past 23 years. The marquee event is of course the NorthShore Inline Marathon, which is the largest inline skating race in North America and one of the most iconic in the world. The NorthShore Inline Marathon has a large economic impact to Duluth and Two Harbors, bringing in nearly 5,000 athletes, spectators and vendors