You signed up for a course. Train for that course. PR Run is course-specific training for trail and ultrarunners.

Why the course, not the distance?

A hundred on rolling dirt is not a hundred on a ridge at 10,000 feet. Mileage is a lazy proxy. Vert, grade, heat, and fuel are the work.

The runner who already entered a race. Western States. Hardrock. The hundred in your backyard.

Start free at trailhead. The Work is $30/month while the launch offer is open. Cancel anytime. See /pricing for the full comparison.

Start at trailhead. First name, a handle, the race you entered. Start the work when you want the full plan.

How does the PR Run race time predictor work?

Enter your ITRA or UTMB index, pick a Course DNA race or custom distance and vert, and add last year's winning time. PR Run returns optimistic, realistic, and conservative finish bands.

Race time

The time the course writes.

ITRA or UTMB index, distance, gain, and last year's winning time. Three numbers: optimistic, realistic, conservative.

ITRA

Find your index

itra.run, then search your name. 200 or above.

UTMB

Find your index

utmb.world. Both indexes sharpen the number.

Winning time

Last year's winner

From the results sheet. The course writes the floor.

Course records

Men and women

Fastest official times on the course. Auto-fills when you pick a race.

Run the numbers

Course

Units

ITRA

Find your ITRA index

UTMB

Find your UTMB index

Distance (mi)

Elevation gain (ft)

Last year's winning time

Hours

Minutes

Seconds

Cutoff (optional)

Hours

Minutes