20-Week Missoula Marathon Training Plan

Missoula, MTJune 27, 2027

Start around February 7, 2027. The calendar below gives each phase a real date, then the course guidance shows where to make the build specific to Missoula Marathon.

The Missoula Marathon starts at 6:00 a.m. in Frenchtown, Montana and finishes in downtown Missoula just past the Beartracks Bridge, in front of the Wilma Theater. The organizers call it flat and fast, and by any reasonable definition it is. It also runs entirely above 3,000 feet and finishes about 177 feet higher than it starts.

Race day
June 27, 2027
Start window
February 7, 2027
Runway
20 weeks
Course
Mostly Flat · Point to Point
Plan choice
Current training

Does this window fit your starting point?

Use the longer window to make the early build calmer, not to add five months of hard training. The plan should begin close to your current load, hold most running easy, and delay the biggest race-specific work until the middle of the cycle.

  • You want a longer foundation phase before marathon-specific training.
  • Your current mileage is steady but below the load you expect to carry later.
  • You prefer gradual long-run growth with regular step-back weeks.
  • You can sustain a five-month routine without turning every week into a peak week.

The 20-week Missoula Marathon calendar

These dates define the job of each phase. Your current mileage, recent longest run, experience, goal, and available days still decide the actual workouts inside them.

Foundation

Weeks 1–6

Feb 8, 2027–Mar 21, 2027

Set the routine, grow easy volume gradually, and finish each week with enough control to repeat it.

Build

Weeks 7–13

Mar 22, 2027–May 9, 2027

Extend the long run, introduce race-specific terrain, and keep recovery weeks on the calendar.

Peak

Weeks 14–17

May 10, 2027–Jun 6, 2027

Complete the most demanding race rehearsals and settle fueling, pacing, shoes, and clothing before taper begins.

Taper

Weeks 18–20

Jun 7, 2027–Jun 27, 2027

Reduce the load, keep familiar running in the week, and let the work from the previous four months show up on race day.

Make the window specific to Missoula Marathon.

Build general durability first. Add the race's hills, flat sustained running, downhill exposure, heat, or humidity in layers after the weekly rhythm is stable, then make the final long runs the most course-specific.

Read the full race guide

How to train for the Missoula Marathon

Train for the Missoula Marathon as a fast course with two complications: it runs above 3,000 feet and it ends higher than it begins. Neither is dramatic. But if you live at sea level, expect goal pace to feel slightly harder than it does at home, and don't set your target off a sea-level personal best without a small allowance.

The net rise of about 177 feet is spread across 26.2 miles, so you'll never feel it as a hill. You'll feel it over the last five miles as a course that isn't giving anything back. Practice long runs that finish on a long, barely perceptible grind uphill and hold goal pace all the way through it.

The one real hill sits near halfway, and the descent right after it, from mile 15.2 to 15.6, is where runners try to recoup what the climb cost. Don't. Rehearse running a mid-race climb at even effort and then rolling into a steep descent with a short quick stride instead of a hard push. Wrecking your quads at 15.5 here means grinding the last ten miles on a road that's tilting up.

Then rehearse the morning. A 6:00 a.m. start with buses leaving between 4:15 and 5:00 means a 3 a.m. alarm and breakfast far earlier than you're used to. Do at least three long runs on that schedule in the final two months, fueling included.

Missoula Marathon course facts

Course
Point to Point · Mostly Flat · Road/Pavement
Elevation gain / loss
492 ft gain, 315 ft loss
Highest / lowest point
3,263 ft / 3,037 ft
Marathon finishers
1,250 in 2026 (mid-size field)
Boston qualifier
Certified Boston qualifying course
Finishers running a qualifying time
8.1% in 2026
Typical race morning
53°F at the start, 71% humidity, clear
Race day high / low
82°F / 50°F on average

Sources

Let your current training decide the actual plan.

Current mileage, recent longest run, marathon experience, goal, and available days determine which plans rank first. After you choose and subscribe, Stride dates every workout through June 27, 2027.

Build My Plan

20-week Missoula Marathon plan questions, answered.

When should I start a 20-week Missoula Marathon plan?

The 2027 Missoula Marathon is scheduled for June 27, 2027, so the 20-week window opens around February 7, 2027. Treat that as the outside edge of the window, then line week one up with the plan's normal weekly rhythm.

Is a 20-week plan long enough for the Missoula Marathon?

Use the longer window to make the early build calmer, not to add five months of hard training. The plan should begin close to your current load, hold most running easy, and delay the biggest race-specific work until the middle of the cycle. The course does not change the opening load you can handle, so choose from your current mileage and recent longest run before adding race-specific terrain.

How should I prepare for the Missoula Marathon course in 20 weeks?

Build general durability first. Add the race's hills, flat sustained running, downhill exposure, heat, or humidity in layers after the weekly rhythm is stable, then make the final long runs the most course-specific. Train for the Missoula Marathon as a fast course with two complications: it runs above 3,000 feet and it ends higher than it begins. Neither is dramatic. But if you live at sea level, expect goal pace to feel slightly harder than it does at home, and don't set your target off a sea-level personal best without a small allowance.

What if the 20-week Missoula Marathon window has already started?

Do not double weeks or cram missed mileage into the remaining calendar. Use your current mileage, recent longest run, experience, goal, and available days to choose a plan that can enter at an appropriate point while preserving the taper.

Is the Missoula Marathon flat?

Mostly. The Missoula Marathon runs between about 3,037 and 3,263 feet with roughly 490 feet of climbing and 315 feet of descent, so it finishes around 177 feet higher than it starts. There's one hill at the halfway point and a notably steep descent from mile 15.2 to mile 15.6.

Does altitude affect the Missoula Marathon?

A little. The course runs entirely above 3,000 feet, which is modest but enough that a sea-level runner should expect goal pace to feel slightly harder than at home. It isn't mountain altitude and no acclimatization trip is needed, but don't set your target off a sea-level personal best without allowance.

Put the 20-week window against your actual race.

Each page counts back from race day, maps the 4 phases to real dates, and applies the window to that course and its typical conditions.