⏵ Course guide · Route of the Hiawatha
The Hiawatha Spring Trail Run runs the Route of the Hiawatha near Lookout Pass on the Idaho/Montana border, through towering forest, past rugged peaks, and through historic train tunnels. I will walk you through the course and what is currently known about it, then give you a pacing and fueling plan for the 50K, 25K, 15K, or 10K. There are free calculators along the way to dial in your own numbers.
These facts come from the official Hiawatha Spring Trail Run site, run by Negative Split. Registration is currently listed as "Coming Soon," so check the official site for the latest details before you commit.
The race is set on the Route of the Hiawatha, a well-known trail corridor near Lookout Pass on the Idaho/Montana border, known for its mix of mountain scenery and rail history.
The official course description points to towering forests and rugged peaks as the visual backdrop for the run, a genuinely scenic stretch of the Bitterroot region that draws runners as much for the setting as the competition.
The Route of the Hiawatha corridor is known for its historic train tunnels, carryovers from the line's rail history, and the race description highlights them as a defining feature of the course. Expect a genuinely different running experience where the corridor's engineering history shapes the terrain.
Negative Split, a Pacific Northwest race organization, runs the event with four distance options: 50K, 25K, 15K, and 10K. The race also supports the Wallace High School Club and Sports Teams as its charity partner.
With registration currently listed as "Coming Soon" and no published elevation or cutoff figures yet, the smartest move is to build a flexible pacing plan you can adjust once the athlete guide is released, rather than lock in specifics too early.
Until specific elevation figures are published, plan your pace around the distance you have chosen and the general character of Route of the Hiawatha terrain, forested mountain trail, rather than a hard number. Once cutoffs and elevation are announced, revisit your plan.
⏵ Free tools to plan your effort
Aid station details were not published on the official page at the time of this writing, so build a self-sufficient fueling plan you can adjust once the athlete guide confirms station locations.
A reasonable starting point for a 50K on forested mountain trail is 60 to 90 grams of carbohydrate per hour while moving and sodium in the 300 to 700 mg per liter range, adjusted for early-summer conditions near Lookout Pass. Carry more than you think you need until station spacing is confirmed.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight and goal time with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.
⏵ Train for it with Summit Line
Get a training plan built around YOUR fitness for the Route of the Hiawatha's forested mountain terrain. Summit Line reads your real training, builds the durability this course demands, and rehearses your fueling so race day is something you execute, not guess at.
The race runs on the Route of the Hiawatha near Lookout Pass, straddling the Idaho and Montana border, through towering forests and past rugged peaks. The signature feature is the historic train tunnels along the route, remnants of the corridor's rail history, giving the course a distinctive character beyond typical singletrack.
The official race site does not publish cutoff times at the time of this writing. Check the current-year athlete guide once registration opens for cutoff details specific to the 50K, 25K, 15K, and 10K.
The official page does not publish elevation gain or loss figures, so the exact difficulty depends on year-to-year course specifics you should confirm before race day. What is clear from the course description is that you are running through mountainous, forested terrain near Lookout Pass, so expect real trail running rather than a flat, groomed path.
With four distances from 10K up to 50K, the race gives you room to pick an entry point that matches your fitness, and the 15K or 25K are reasonable first steps if the 50K feels like too much. Negative Split, the organizing company, runs a range of Pacific Northwest events, so the race logistics are handled by an experienced organizer.
As of this writing, the official site lists the next edition for June 6, 2027, with registration marked "Coming Soon" through RunSignUp. Confirm the current date on the official site before making travel plans, since race dates can shift as registration opens.
No. Negative Split also organizes a separate Hiawatha Fall Trail Run each September on related terrain. This guide covers the spring edition specifically.
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<a href="https://runsummitline.com/guides/hiawatha-spring-trail-run">The Hiawatha Spring Trail Run course guide</a><iframe src="https://runsummitline.com/embed/race/hiawatha-spring-trail-run" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Hiawatha Spring Trail Run course guide by Summit Line"></iframe>This guide is independent and for planning only. The date, course, and logistics come from public sources, are still being finalized by the race at the time of writing, and can change, so confirm the current specifics with the official race before you register or run. The fueling and pacing advice is general and not medical advice.
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