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St. Luke's Half Marathon | Tunnel 10k


September 16th, 2023 | Duluth, Minnesota

The NorthShore Inline Marathon is proud to offer non-skating races with our two unique running races, our St. Luke's Half-Marathon and Tunnel 10k. The St.Luke's Half-Marathon offers a beautiful route along Lake Superior navigating the scenic north shore drive. The race also adds a one-of-a-kind twist! Runners take a turn at the northern end point of I-35  while entering Duluth and get the experience of running on the Interstate. The Tunnel 10k racers also get the unique experience of running on I-35, through the tunnels both ways. Join hundreds of other runners for this unique fall set of races.


NorthShore Run Pricing

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The NorthShore Run's Signature Events

St. Luke's Half Marathon

13.1 Miles | point-to-point 

Run along the scenic North Shore of Lake Superior, on a 13.1 mi point to point course. Enjoy the same spectacular and iconic route as another premiere Duluth Half Marathon run in June, but take the interstate (I-35) for the last few miles of the race. During the St. Luke’s Half Marathon runners will start on the Scenic Highway and run along the unmatched shoreline to Duluth. In Duluth, runners enter the interstate highway system and go through the I-35 tunnels, completely unique to our event. To finish, runners will drop down to the St. Louis Bay to finish alongside the famous William A. Irvin freighter as fans cheer you on.

Join hundreds of other runners and enjoy the beauty of fall on the North Shore of Minnesota.

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NorthShore Tunnel 10k

6.2 Miles | Circle Route

You won't want to miss the chance to run this one-of-a-kind race. The Tunnel 10k race route takes you through 6 tunnels of I-35 and will keep a spring in your step with live music. While most of the time if you are running or walking on an interstate, you are carrying an empty gas can, not during the Tunnel 10K! Our closed course allows you to run on one of the most unique race routes in Minnesota. After experiencing the rare chance to race on an Interstate, you will continue alongside the St. Louis Bay to the finish line at the famous William A. Irvin, a retired lake freighter. Join us come race day!

St. Lukes Half
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The NorthShore Run Experience

Important Info

The NorthShore Race Course


Important Dates & Times

Friday, September 15, 2023:

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 - Training & Health Sessions (TBA) | DECC South Pioneer Hall - Free

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

Saturday, September 16, 2023: (Start times)


Running | 10k & Half Marathon:

  • 6:45 am  -  Half Marathon Skate Mass start (gun start)

  • 7:00 am  -  St. Lukes Wheels Off Half Marathon Run Start (Runners)

  • 8:00 am  -  Tunnel 10k Run Mass Start | Details on starting location below

2023 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 16, 2023: (Race Day)


Bus Loading Times:

  • 5:15 am-5:45 am - Half Marathon (Skate, Ski and Run)      

  • 6:30 am-7:00 am - Elite (Open and Masters)                                  

  • 6:45 am-7:15 am - Advance Waves (1-2)   

  • 7:00 am-7:45 am - All Recreation Waves (1-3)                             


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 15th, 2023| noon – 9 pm

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

Race Timing 

Race Timing

Your race packet will contain a bib with an attached disposable My Laps Chip, provided by Endurance Promotions (our contracted timing company for the NorthShore events) out of Maple Grove, MN. The Chip is a transmitting device for timing.  Please wear the bib on the front of your body.

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 bib should be pinned to your chest or abdomen.

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.


2023 Major Sponsors

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Contact NSIM

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

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