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Dominion Trestle - Trail Rail Run

Race Info

More Information

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About the Trail

Rooted in the rich railroad history of western Montana, the Trail Rail Run follows historic rail beds once used by the Northern Pacific and Milwaukee Railroads. These converted railroad grades feature a wide, mostly dirt and gravel surface with a gentle incline—never more than a 2% grade.

This forgiving terrain offers a unique and scenic alternative to traditional road races. It’s easier on the body than pavement and far less technical than steep singletrack trails, making it a great choice for runners of all experience levels.

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Packet PickUp

Friday, June 20 | 3:00 PM – 7:00 PM
📍 St. Regis Community Center – St. Regis, MT
Pick up your full race packet, including your bib number, shirt, and swag bag.

Saturday, June 21 | 5:00 AM – Shuttle Departure
📍 St. Regis Travel Center
Race bibs only will be available for pickup Saturday morning. Once the shuttle departs for each race start, any remaining bibs will be sent to the starting line.

Please note: Shirts and swag bags will not be available on race morning. If not picked up Friday, they will be waiting for you at the finish line.

Trail Rail Run St. Regis Map

Bus Departures

Saturday, June 21 | St. Regis Travel Center, St. Regis, Montana

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All participants must take the shuttle to their respective start lines.

Please arrive early and bring your bus ticket. Departure times may vary slightly due to road construction or traffic delays.

  • 50 Mile runners: Bus departs at 5:30 AM. Race starts at 7:00 AM (Montana time) / 6:00 AM (Idaho time) — remember, you’ll be crossing time zones!

  • 50K runners: Bus departs at 7:00 AM. Race starts at 8:00 AM (Montana time).

  • 30K runners: Bus departs at 8:00 AM. Race starts at 9:00 AM (Montana time).

  • 12K runners: Bus departs at 9:15 AM. Race starts at 10:00 AM (Montana time).

  • 5K runners: Bus departs at 9:30 AM. Race starts at 10:15 AM (Montana time).

🚨 Reminder: Shuttle buses leave promptly. Late arrivals may miss their transport. Be sure to bring your bus ticket and bib number with you.

Race Starting Lines & Times

50 Mile Ultra Marathon:

Start in Mullan, ID and journey 50 scenic miles along historic rail trails to St. Regis, MT. A tunnel, trestles, and epic mountain views await.

50K Ultra:

Begin in Taft, MT and enjoy 33 miles of gradual downhill trail running through forests and historic railway paths to St. Regis

30K Trail Run: 

Run 19.5 miles from Haugen/Savenac, MT to St. Regis on a beautiful, gently descending trail rich with natural beauty and history.

12K Trail Run: 

A fast and scenic 7.5-mile run from Ward Creek Exit to St. Regis, perfect for mid-distance trail runners.

​5K Trail Run: ​

A fun and approachable 4 mile trail from the Two Mile Exit to St. Regis—great for beginners and families.

​50 Mile Relay Trail Run:

Team up (2–7 runners) and tackle the 50-mile course from Mullan, ID to St. Regis, MT together—shared miles, shared glory.

Trail Rail Run 50 Mile Map

Aid Stations

Fuel for your race is generously provided by the St. Regis Community Council, Hammer Nutrition, and our dedicated aid station volunteers.

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There are 10 aid stations along the course, each stocked with a variety of refreshments and endurance nutrition to keep you going strong. Offerings include:

  • Hydration: Water and HEED Endurance Drink (by Hammer Nutrition)

  • Snacks & Fuel: Peanut butter & jelly sandwiches, bread, granola bars, jelly beans, fresh fruit (oranges, melons, bananas), homemade cookies, and pickle juice

  • Nutrition Supplements: Hammer Gel and Endurolytes (by Hammer Nutrition)

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Each aid station is also equipped with basic medical supplies. Additionally, medical staff are stationed throughout the course, and an ambulance is available at the finish line. For safety and communication, HAM radio operators are positioned along the route, and transportation to the finish line is available if needed.

Your well-being is our priority—run strong and know you’re supported every step of the way!

Toilets

Portable restrooms are available at each aid station, the race starts, and the finish line.

Gear Bags &
Drop Bags

Gear Bags

Runners participating in the 50 Mile, 50K, and 30K events may leave a Gear Bag at the start line to be transported to the finish area. These bags are intended for clothing or personal items you wear while waiting to start (e.g., sweatshirts, sweatpants) that you don’t plan to run in.

  • A designated vehicle will transport Gear Bags to the finish line.

  • Your bag will be waiting for you at the designated gear return area.

  • Be sure to clearly label your bag with your name

  • Please note: We are not responsible for lost or misplaced items.

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Drop Bags

Drop Bags are for mid-race personal items you want to access during your run, such as nutrition, sunscreen, blister care, a change of socks or shoes, etc.

  • 50 Mile runners may submit up to two (2) Drop Bags.

  • 50K runners may submit one (1) Drop Bag.

Drop Bag Locations:

  • Aid Station #3 – Dominion Trestle (50 Mile only)

  • Aid Station #7 – DeBorgia (50 Mile & 50K)

Drop Bags must be left at the designated area during packet pickup or during late pickup near the shuttle buses on race day morning. After the event, we will return Drop Bags to the finish line.

  • Clearly label each Drop Bag with your name, bib number, and aid station.

  • We do our best to return all bags, but we are not responsible for lost or forgotten items.

50 Mile Relay

The 50-mile course of the Trail Rail Run is ideally suited for a relay format, with convenient highway access at multiple transition points. We’re excited to continue offering the 50-Mile Team Relay, providing a fun, inclusive way for groups to experience this beautiful course.

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Team Format

  • Teams consist of 2 to 7 runners

  • The course can be divided into up to 7 legs:

    1. Mullan to Lookout Pass – 8 miles (climb)

    2. Lookout Pass to Taft Exit – 9.5 miles (downhill)

    3. Taft to Saltese – 7.5 miles

    4. Saltese to DeBorgia – 9 miles

    5. DeBorgia to Ward Creek – 7.5 miles

    6. Ward Creek to Two Mile Exit – 3.5 miles

    7. Two Mile Exit to St. Regis – 4 miles
      Or combine Legs 6 & 7 for one 7.5-mile segment from Ward Creek to the finish.

We love this option because it allows runners of varying distances and abilities to experience some of the most scenic portions of the 50-mile course.

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Relay Details

  • The relay is timed as a group only — individual leg times will not be recorded.

  • Team captains are responsible for organizing transitions at exchange zones.

  • The final runner must wear the team’s timing chip and cross the finish line to complete the race.

  • Additional exchange zones may be considered — team captains can contact us to discuss logistics.

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Perfect for Groups

Whether you're friends, coworkers, or family members, the relay offers a great way to run together and support each other in a festive, team-oriented environment.

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How to Register Your Team

  1. Team captain creates the team on the registration page and selects a unique team name.

  2. Team members go to the registration page, join the team, and pay their individual entry fee.

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Note: Only solo 50-mile finishers are eligible for the Patagonia finisher’s jacket.

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For questions about team logistics or setting up your relay, please contact us at trailrailrun@gmail.com.

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