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42k Rollerski | 21k Rollerski

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NSIM Rollerski Races

September 14th, 2024 | Duluth, Minnesota

The NorthShore Inline Marathon is proud to offer races for cross country skiers with our two unique roller ski races. Our 42k and 21k offer a beautiful route along Lake Superior. The NSIM roller ski races navigate the scenic north shore drive. Roller skiers take a turn while entering Duluth, where they get the experience of roller skiing on Highway 61 and I-35. Join one of the largest roller ski races of its kind. Grab your roller skis, boots and poles and take part in a beautiful race along the North Shore. Compete against some of the top skiers in North America, or grab some buddies and ski with friends. Our races are perfect for all ranges of abilities. Ski the beautiful scenic route on the North Shore while you gear up for winter.

NorthShore Rollerski Events

42k Ski
VW of Duluth Marathon Rollerski

42 Kilometers | point-to-point 

Our 42-kilometer option is the classic “ski marathon.” Starting in Two Harbors, Minnesota, this race takes you along the shores of Lake Superior on the beautiful Scenic Highway. As you get closer to Duluth, the landscape changes, and the fans on the side of the road become more plentiful. Ski the famous I-35 tunnels, From there, finish with an outstanding view of the Aerial Lift Bridge. Join us at the nation's premier marathon rollerski race.

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NorthShore Ski 21k

21 Kilometers | point-to-point

 This race is a great option for younger rollerskiers, more recreational rollerskiers, or skiers who are not looking for marathon distance competition. The 21K is race starts at the halfway mark of the 42k option, but still has the same charm. Racers still get to ski along the shores of Lake Superior on the famous Scenic Highway and I-35 tunnels. The finish line is the same as the 42k, with amazing views of the Aerial Lift Bridge that Duluth is so famous for.

21k Ski
Impotant Info
NSIM Price Chart Rollerski

The NorthShore Rollerski Experience

The NorthShore Race Course

NSIM 2023 Race Maps Full Marathon

Important Dates & Times

Friday, September 13, 2024:

Skate and Health Expo​

All-day Friday check out vendors from Duluth, the running industry, and plenty of other outdoor and adventure companies. In addition, clinics will be going on all day. This is a great opportunity to strap on your skates, try something new, or just join in for fun! These clinics are for all levels of skaters and runners . Outside the expo area will be our skatepark and skate cross course.

  • 12:00 to 9:00 pm -  Skate & Health Expo | DECC South Pioneer Hall - Free

  • 12:00 to 9:00 pm - Packet Pickup | DECC South Pioneer Hall

  • 12:00 to 9:00 pm - Inline Training & Health Sessions (TBA) | DECC South Pioneer Hall - Free

  • 7:00 pm  -  Friday Night Skate | NSIM finish Line - Free

Competitive Inline Sprints 

Don’t forget about the annual Inline Sprints! The races are free for kids. Registration begins at 4:00 pm at the Info Booth, races begin at 4:30.

  • 4:00 pm  -  Adult Inline Sprints Registration | DECC Finish Line

  • 4:00 pm  -  Adult Rollerski Sprints Registration | DECC Finish Line 

  • 4:00 pm  -  21st Annual Kids Sprints Registration | DECC Finish Line- Free 

  • 4:30 pm  -  Sprints Waves Start | DECC Finish Line

Saturday, September 14, 2024: (Start times)


Rollerski 42k & 21k:

  • 6:50 am  -  Rollerski 21k mass start

  • 8:30 am  -  Rollerski 42k mass start

2024 NSIM Award Ceremonies:

  • 12:00 pm  - 10k Run, Half Marathon Run Awards - DECC South Pioneer

  • 2:30 pm  -  Inline Marathon and Combined Skate Awards- DECC South Pioneer Hall

Transportation to Start Line

Buses begin loading from the DECC parking garage area on Railroad St. for the Half Marathon events at 5:15 am, Full Marathon event buses begin loading at 6:30 am. Please board promptly to ensure that everyone arrives at the start lines on time.

The Tunnel 10k (Skate & Run) starts on 1-35 at the base of the 5th Ave exit ramp going north.  The race travels north on the northbound lanes to 26th Ave east where there is a water station and makes a u-turn and then travels down the southbound lanes.  At that point, the race follows the same course as the half/marathon races and will finish near the Irvin.

Saturday, September 14, 2024: (Race Day)


Bus Loading Times:

  • 5:15 am-5:45 am - 21k Rollerski      

  • 6:30 am-7:00 am - 42k Rollerski                                                       


NO Rec Wave 3 skaters are not permitted to board the buses until 7:00 am

For those coming from Two Harbors, it is permissible to be dropped off at the Two Harbors Sonju car dealership and walk or skate to the start line.

10k skaters and runners do not require bussing. 

10k Runners & Skaters will walk to the starting line.

Other Important Information

Gear Bags

Gear bag trucks will be at the starting line for the half and full marathons so you can bring items to the start (sweatshirt/jacket, shoes, warm-up gear, food, etc…). Please note that you may NOT wear skates onto the start line buses. Gear bags will be delivered to the finish line area by the time you are finished with your race.


  • Half Marathon Skate and Rollerski gear bag truck will be in front of the start line and will depart at 6:30 AM.

  • Half Marathon Run gear bag truck will be behind the start line (near bus drop-off area) and will depart at 6:45 AM.

  • Elite and Rollerski Marathon gear bag truck will be in front of the start line and will depart at 8:25 AM.

  • Marathon (Advanced and Rec wave) gear bag truck will depart at 900 AM.

  • Tunnel 10k Skate participants will have the option to leave gear in a drop bag inside South Pioneer Hall (DECC) before the race and may be picked up once you finish.

We are not liable for lost or damaged items. Please do not include anything valuable or fragile in your drop bag.

Packet Pickup

Packet Pickup:

Your Race Packet contains a unique race bib and timing ankle strap, race shirt, pins, athlete guide, and sponsor goodies. Please make every effort to pick up your own packet on Friday.

Friday, September 13th, 2024 | noon – 9 pm

Pioneer Hall at the Duluth Entertainment Convention Center (DECC) | Duluth, MN

Race Timing 

Race Timing

Your race packet will contain an envelope with a Race Bib with a disposable MyLaps Chip, provided by Endurance Promotions (our contracted timing company for the NorthShore events) out of Maple Grove, MN. 


Race Bibs

If you would like your name printed on your bib you must be registered by August 20th. Do not fold, wrinkle, or alter these numbers. The custom bib with chip should be pinned to your chest or abdomen area, and if you are a skater or rollerskier the second black and white bib should be pinned to your right hip.

Lodging & Transportation Information

NorthShore Lodging 

The NorthShore Inline Marathon loves having out-of-town visitors for our event. Because of that, we have made partnerships with local hotels and motels in the area to get you the best deals and a place to stay. Click lodging to learn more.

(Make sure to book early as it fills up fast!)

Our Lodging Partners: 

Flying to Duluth or Minneapolis

The Duluth International Airport offers great flight packages from anyone coming from across the country. This is our recommended route for anyone who plans to fly to our event. We then recommend renting a car, taking an uber/taxi, or calling your hotel shuttle to pick you up. 

If the Duluth International Airport may not meet your needs, the Minneapolis-St. Paul International Airport (MSP) is another great option. Located just over two hours south of Duluth, MSP offers a wide variety of flights and is one of the largest airport hubs in the midwest. For more information on MSP check out their website here: MSP International Airport


Transportation from MSP/Minneapolis to Duluth

Being the largest inline marathon in North America draws crowds from across the country. Many participants come from out of state. Because of that, the NorthShore Inline Marathon has created a partnership with our local bussing company that will pick you up from the MSP Airport and brings you to Duluth. For more information on this program make sure to contact our transportation partner: 

Past Results 

Have you done NSIM in the past? Check out the link below to see your previous times.


Thank you to our friends over at Duluth Timing for their continuous support and for helping us with our timing needs.

Safety Protocols


On the recommendation of the USOPC, in partnership with our medical provider, our events will follow local public health guidelines for COVID-19 risk mitigation.

Helmets are mandatory at all times while on the racecourse for skating and rollerski races. Wrist, knee, and elbow protection are also recommended.

Rollerskiers are asked to stay to the right of the roadway. All slower athletes please stay towards the right, all faster athletes please pass on the left and announce yourself as you pass.

The entire course for all NorthShore Races is completely closed to outside traffic. All event participants must be at 26th Avenue East (entrance to the freeway) by 1:30 pm to be able to complete the event. This is Mile 23. The course MUST be open to traffic at 2 pm.

Please be mindful of road conditions. We strive to maintain the best road conditions possible, thanks to local entities like the Minnesota Department of Transportation, the City of Duluth, Saint Louis County, and Lake County. However, there is always the possibility of cracks, “tar snakes”, bumps, sand and rocks, water bottles, garbage, and other obstructions.

First aid will be available on the course and at the finish line. There are vans and motorcycles on the course with medical personnel. All medical expenses incurred by participants are the responsibility of the participant.

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2024 Presenting Partners

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Contact Our Team

Have any questions? Make sure to get in contact with us. We are happy to answer any questions.

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