A trail runner on a grassy ridge above a sea of clouds

The Rut Mountain Runs

The Rut Mountain Runs is a mountain trail weekend held at Big Sky, Montana. 5 km Trifecta, with the Lone Peak summit climb on the longer routes.

Prepare for The Rut Mountain Runs

A plan built from your answers and your race date.

trail training plan

The Rut Mountain Runs takes place on the Big Sky resort terrain in southwestern Montana, north of Yellowstone National Park. The courses climb ski runs, ridge trail and rocky slopes, with the summit push up Lone Peak as the centerpiece of the event. The ground is steep and rocky at elevation, and September weather can turn quickly.

6 km Lone Peak VK. The race spent years on the Skyrunner World Series calendar.

The formats

6 formats on the program.

Format	Distance
Trifecta	52.5 mi
50K	31 mi
28K	17 mi
21K	13 mi
11K	7 mi
Lone Peak VK	2.9 mi

Organizer information, checked on September 21, 2026 · runtherut.com

When to start

At this distance, a build usually runs 12 to 24 weeks. The 2027 date is not published, so counting back from September puts the start around March 29, 2027.

These ranges are working conventions, not a research finding — no trial has compared plan lengths against each other. What matters more is that the plan was built for the weeks you actually have, rather than shrunk down from a longer one.

How to choose your start date

When to start

March 29, 2027

→ June 21, 2027

Worth reading before you enter

Races and distances Trail distances: what changes off the road Distance stops being the useful number. What decides a trail race is how long you are out, how much you climb, and how much the descents have wrecked your legs by the end. Read Training Eating and drinking: what’s proven, what isn’t This is where confident advice most often runs ahead of the evidence. Some of it is well tested. Some is opinion wearing a number. And one common habit can kill you. Read Races and distances When to start preparing your race Most plans fail before the first session, because the block started too late and everything had to be squeezed. Counting back from the date is the dullest and most useful thing you will do. Read

Questions

What is the date of The Rut Mountain Runs in 2027?

The organizer has not published the 2027 date for The Rut Mountain Runs yet. The race is usually held in September, in Big Sky.

What distances does The Rut Mountain Runs offer?

6 km Lone Peak VK. The longer courses include the climb to the Lone Peak summit.

How hard are The Rut courses?

They are demanding. The routes use steep, rocky slopes up to Lone Peak, with long sections of power-hiking. Technical footing and altitude slow pace sharply, even on the shorter distances.

Other races

This list keeps growing; it draws no line. A race that is missing is prepared for in exactly the same way.

Honolulu · United StatesUltra HURT 100 Jan 16 Its five-loop, 20-mile-per-lap format carries a famously high drop-out rate. Bandera · United StatesUltra HOKA Bandera Endurance Trail Race January The HOKA Bandera Endurance Trail Race is a trail and ultra weekend held in Bandera, Texas, inside the Hil Moab · United StatesUltra Moab 240 Endurance Run January 7 km ultramarathon with 9,620 m of vertical gain, run as one continuous loop out of Moab, Utah. It is par Your race is not here? Tell us about your race You can prepare for it all the same. Any race, anywhere, and even a goal without a race.

Your race is on the calendar. Your plan should be too.

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