⏵ Course guide · Four-peaks Lake Superior ultra
The Marquette Trail 50 climbs four named peaks, Sugarloaf, Top-of-the-World, Bareback, and Hogback, with Lake Superior views along the way, 5,520 feet of gain for the 50 mile on rocky, rooty Upper Peninsula singletrack, and no pacers allowed. I will walk you through the four-peaks terrain first, then give you a pacing and fueling plan built for technical footing and a solo effort, plus free tools to dial in your own numbers.
These facts come from the official Marquette Trail 50 overview, schedule, and FAQ pages. Field caps, aid station details, and intermediate cutoffs can change year to year, so confirm the current specifics on marquettetrail50.com before you commit.
Both the 50K and 50 mile start together at 5:30 am from Forestville Trailhead, running mostly singletrack through the Noquemanon Trail Network and climbing four named peaks: Sugarloaf, Top-of-the-World, Bareback, and Hogback, with portions of the course skirting the Lake Superior shoreline.
Ultrarunning Magazine rates the course 3 out of 5 for terrain, "Hilly," and 4 out of 5 for surface, "Trail with substantial rocks, roots and/or ruts." Those ratings are a useful, honest signal: this is not a smooth, runnable course, and the technical demands deserve as much preparation as the climbing.
The race caps entries at 375 for the 50K and 175 for the 50 mile specifically to keep the event quality high on singletrack that cannot handle a huge field comfortably. Both distances tend to fill quickly, so plan your registration around the Black Friday opening if you want a spot.
Marquette Trail 50 does not allow pacers for either distance, a deliberate choice that keeps the race a true individual effort even in the late miles. Build your race plan and mental strategy around running the entire distance solo, since you cannot count on a pacer to carry you through a rough patch late in the day.
With a 5:30 am mass start and a 15 hour cutoff for the 50 mile (12 hours for the 50K), the technical surface rating matters as much as the elevation profile for your pacing plan.
A grade-adjusted pace target for the four-peaks climbing gives you an honest number for the vertical demands, but remember the 4/5 surface rating means your flat-ground pace will not translate directly either. Build in real margin for the rocky, rooty sections, especially on tired legs in the race's second half.
The longest gap between aid stations runs about 6 miles, which the race itself notes can take several hours on this terrain. A vert-aware finish prediction built from your early splits, checked against the 12 or 15 hour cutoff at each aid station rather than just at the finish, tells you honestly whether your pace holds up.
⏵ Free tools to pace this course
A 5:30 am start and cutoffs stretching to 8:30 pm for the 50 mile mean a long day out on Lake Superior shoreline and technical inland trail.
Aim for roughly 60 to 90 grams of carbohydrate per hour. Because this is a cupless race, you are responsible for your own bottle, cup, or hydration system at every aid station, so plan your carrying capacity around the roughly 6-mile longest gap between stations.
Sodium in the 300 to 700 mg per liter range covers most runners. Portions of the course skirt the Lake Superior shoreline with real sun exposure, even in a generally milder Upper Peninsula August, so lean toward the higher end during those stretches and on any particularly warm race day.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and a full Upper Peninsula August day 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 race-day plan built around YOUR fitness, this exact four-peaks climbing profile, and your projected splits. Summit Line reads your real training, builds a plan for technical, rocky terrain, and rehearses your fueling so race day is something you execute, not guess at.
Marquette Trail 50 climbs four named peaks, Sugarloaf, Top-of-the-World, Bareback, and Hogback, all with Lake Superior views, on mostly singletrack trail. Ultrarunning Magazine rates the terrain 3 out of 5 for hilliness and 4 out of 5 for surface difficulty, "trail with substantial rocks, roots and/or ruts." The 50 mile climbs about 5,520 feet and the 50K about 3,237 feet, real numbers for Upper Peninsula terrain most people underestimate. No pacers are allowed for either distance, which adds a genuine self-sufficiency element on top of the technical footing.
The official race site lists an estimated total elevation gain of 3,237 feet for the 50K and 5,520 feet for the 50 mile. That climbing comes from four named peaks along the course, each offering Lake Superior shoreline views, rather than one continuous ascent, so expect repeated hard efforts broken up by rolling recovery sections.
With a 5:30 am mass start and cutoffs of 12 hours (50K) and 15 hours (50M), most runners are out through a full day in Upper Peninsula August conditions, generally milder than lower Michigan but still capable of real heat on an exposed shoreline stretch. This is a cupless race, so you must carry your own bottle, cup, or hydration system to use at aid stations. Aim for roughly 60 to 90 grams of carbohydrate per hour, and sodium in the 300 to 700 mg per liter range. The longest stretch between aid stations runs about 6 miles, which can take several hours on this terrain, so carry enough capacity to cover that gap comfortably. Build your numbers with the free ultra fueling calculator before race day.
The 50K must finish by 5:30 pm, a 12 hour cutoff from the 5:30 am mass start. The 50 mile must finish by 8:30 pm, a 15 hour cutoff. Both distances start together, so the 50K field effectively has 5:30 am to 5:30 pm to complete their race while 50 mile runners continue on. The race also enforces intermediate cutoffs at points along the course, so check the current course map for those splits.
No. Pacers are not allowed at Marquette Trail 50, for either the 50K or the 50 mile. That is a deliberate choice that adds real self-sufficiency to the race on top of the technical, rocky and rooty terrain, so plan your race as a solo effort from start to finish rather than counting on late-race pacer support.
For a runner with real technical trail experience, yes, though the terrain rating (4/5 for surface difficulty) and the lack of pacer support mean this is not the gentlest first-ultra option. A well-prepared first-timer who has trained on rocky, rooty singletrack and is comfortable managing their own race without a pacer will find the 15 hour cutoff generous and the small, well-supported field, capped at 175 for the 50 mile, a genuinely rewarding first Upper Peninsula ultra.
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<a href="https://runsummitline.com/guides/marquette-trail-50">The Marquette Trail 50 course guide</a><iframe src="https://runsummitline.com/embed/race/marquette-trail-50" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Marquette Trail 50 course guide by Summit Line"></iframe>This guide is independent and for planning only. The course details, dates, cutoffs, and aid stations come from public sources and can change year to year, 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.