Name: 2026 - NorthShore Inline Marathon
Start: 2026-09-18
End: 2026-09-19
Location: Duluth, Minnesota

About the Event

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 Duluth to participate in this one-of-a-kind event. The NSIM offers a historic route, great views, and an even 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 28th year of skating.

Our event also includes our running division, which hosts two breathtaking runs. The first is the St. Luke's Half Marathon, one of Minnesota's most beautiful half marathons. This event begins on the scenic North Shore highway, with runners making their way through the Northland woods, passing through the tunnels of Interstate 35, and finishing alongside the iconic William A. Irvin. Our second race, the Finden Marketing Tunnel 10k, offers runners a unique experience of traversing the I-35 tunnels, covering 6 miles of interstate before finishing near the William A. Irvin.

Lastly, our FinnSisu Ski Division is an emerging part of our race series. It offers roller skiers of all skill levels two options: a 42k and a 21k Rollerski. Participants can ski alongside over 2,000 inline skaters, immersing themselves in the event's lively atmosphere!

Bring friends, make memories, and skate on!

Races Offered

Northern Lights Foundation Kids Sprint: INLINE SKATE

Sep 18, 2026

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Distance — 200m

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Type — Road running

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16:00

Northern Lights Foundation Kids Sprint: RUN

Sep 18, 2026

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Distance — 200m

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Type — Road running

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16:00

Combined 39.3 Mile Skate

Sep 19, 2026

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Distance — 39.3 Miles

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Type — Road running

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06:45

Half Marathon Skate

Sep 19, 2026

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Distance — 13.1 Miles

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Type — Road running

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06:45

Marwe Half Marathon Rollerski

Sep 19, 2026

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Distance — 21K

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Type — Road running

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06:50

Aspirus St. Luke's Half Marathon Run

Sep 19, 2026

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Distance — 13.1 Miles

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Type — Road running

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07:00

CIty of Duluth Tunnel 10k Skate

Sep 19, 2026

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Distance — 10K

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Type — Road running

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07:45

Finden Marketing Tunnel 10k Run

Sep 19, 2026

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Distance — 10K

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Type — Road running

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08:00

FinnSisu Rollerski Marathon

Sep 19, 2026

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Distance — 42K

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Type — Road running

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08:30

NorthShore Inline Marathon

Sep 19, 2026

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Distance — 26.2 Miles

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Type — Road running

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08:45

Weather Overview

These values represent the 3-year monthly averages for September in Duluth.

Temp (°C)

Feels Like (°C)

thermostat 14.3° / 22.7°

wb_sunny 12.7° / 21.8°

Wind (km/h)

Humidity (%)

air 11.7 /

water_drop 75.4%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 14.3° / 22.7°

wb_sunny 12.7° / 21.8°

air 11.7 km/h

water_drop 75.4%

About Duluth

Duluth is a city of about 86,000 people (2018) in northern Minnesota. It is one of the most scenic cities in the Midwest. Duluth has a thriving tourism industry, with antique shops, excellent restaurants, cozy inns, and scenic views of the lake. There is a ski resort inside city limits.