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Be a Part of USA's
Largest Skating Marathon

September 17th - 19th 2021
Duluth, Minnesota

Join the Skating Event 25 Years in the Making

Founded in 1995 the NorthShore Inline Marathon is dedicated to spreading the love of inline skating and overall fitness. Every year over 2,000 athletes of all ages ranging from 10 to 95 come and participate in our events. With a historic route, great views, and an even better community; NSIM has been called one of the best inline marathons in the world by countless individuals and has become a tradition for many. Come join us this year for our 25th anniversary. Bring friends, make memories, and skate on.


Our Signature Races

No matter if you skate, run, or ski the North Shore has a race for you. Join in on the action by signing up for our marathon, half, or 10k's! The NSIM has been providing top-class races for over 20 years along the beautiful shores of Lake Superior. Grab some friends, and come make memories with us as we celebrate the big 25.

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Skating Races





2021 Major Sponsors

We are extremely proud to showcase our sponsors and our race couldn't happen without their endless support. Interested in sponsoring NSIM? Email skeeter@northshoreinline for more information

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Past Racers Remarks
Frequently Asked Questions

Best inline marathon I have ever done. The route is amazing and overlooks lake superior, the people are friendly, and its just a fantastic community. I would recommend for all levels beginner to professional!

Andrew Weisz


What do I do with my shoes at the start of the race?

We provide a bag with your bib number on it so that you may place your personal items in it. The bags are then placed in trucks and transported to the finish area. Please be patient. It takes time to sort thousands of bags. Do not put any valuables in the bag.

How do I use my deferal from the 2020 race?

There is no limit for those that registered last year with insurance. Participants from last year had 3 choices; 1) participant in the virtual 2) donate their entry, 3) get a coupon for a discount that could be put towards 2021 event. People that paid for insurance last year had same options plus defer to 2021. They were asked to email us after 2021 registration opened To receive a code. to get said code email skeeter@northshoreinline.com

Is there a quad skater category?

Yes! We’ve added a category for quad/roller skates in the full and half marathon. Please register for the quad wave during online registration, or email mike@northshoreinline to switch. Quad skaters in the full marathon will start with Rec Wave 1. Quad skaters in the half marathon are included in the mass start. PLEASE NOTE that ALL skaters must be off of the race course by 2pm! Please plan accordingly!

Can I change events?

Yes, event changes must be done prior to August 31. There are fees associated with event changes. Please contact the office at (218) 723-1503 or email for further details.

Can I pick up my race packet the morning of the race?

Yes, from 5:00 – 8:30 am a tent will have all the remaining packets at the front main entrance to the DECC complex where the buses load. Once the last bus leaves the packets are no longer available. Note: this is not the door used for the expo of the finish line activities.

Is this event only for competitive skaters?

No! Our race promotes skating, running, and rollerskiing for all and have different waves for different levels. Check out race weekend to learn more!

Are there local lodging options for the weekend?

Yes! We have multiple options for racers to choose from that can all be found on our lodging page located in "race info"

How do I see past results?

Great question! Click on this link below to see results going back over a decade



Tel. (218)-723-1503
525 S Lake Ave,
Duluth, MN 55801

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