Evidence
Based
Coaching

The coaching behind wins at UTMB and Western States.
Built on evidence, measured in results.

Work with me About me
Champions coached3× WSER · 2× UTMB · 1× World Champion
The curriculumdeveloped for the UESCA ultrarunning coach certification
The textTraining Essentials for Ultrarunning
247 episodesthe Koopcast archive, fully transcribed
About

Coach. Author. Bridge between the science and the sport.

For more than 20 years I've coached ultramarathon runners — from first-time 50K athletes to champions of Western States and UTMB. I pioneered the application of sports-science research to ultrarunning, translating what the lab actually shows into what works on the trail.

I lead the CTS High Performance Team, wrote Training Essentials for Ultrarunning, hosted the Koopcast for 247 episodes, and write a column for Ultrarunning Magazine. I also developed the curriculum for the UESCA ultrarunning coach certification, so part of the job is training coaches, not just athletes. If you race ultras, my fingerprints are probably on something in your training.

Jason Koop
Explore

Four ways in.

Coaching

Coaching

Individual coaching with me, or I build a team of professionals around you. Limited roster, full attention. Starts at $1,295 a month.

Start the conversation → New

Koop AI

My training methodology, on demand. Evidence-based answers to your ultrarunning training questions, anytime.

Try Koop AI → Book

Training Essentials for Ultrarunning

The benchmark book for ultramarathon training, used by elite and everyday athletes alike. Also on audiobook.

Get the book → Archive

Koopcast

Ultra. Training. Science. 247 episodes with the researchers and thinkers shaping the sport — every one fully transcribed and searchable.

Browse episodes →
How Coaching Works

Performance by design.

Coaching isn't a plan you receive — it's a loop we run together. Six stages, always turning, every input feeding the next decision.

Stage 1 of 6

Case Studies

A few of the athletes I coach.

A sample, not the roster — three different stories from the front of the sport. Click through for how we worked together.

Katie Schide

UTMB and Western States Champion · Hardrock 100 Champion · World Long Course Champion
Read the case study →

Fuzhao Xiang

2024 and 2025 Western States Runner-up
Read the case study →

Ryan Montgomery

Western States 2026 · 3rd
Read the case study →
Use My Tools

The analysis I run for my athletes. Free, for you.

No paywall, ever. Both are in final testing — they open in the next few weeks. Here is exactly what is coming.

Training · first up

Athlete Progress Report

A season-over-season dashboard of your running: volume, grade-adjusted pace, vert, long runs — the same review I do with my athletes.

1 · Your name2 · Two years of training3 · Report in your inbox
Under construction

The engine is built and tested — I’m finishing the last leg, the part that renders and publishes your report. Opening shortly. Leave your email and I’ll tell you the day it opens.

1
Who you are
2
Two years of training

Two seasons is what makes this a comparison instead of a snapshot. Either route below produces the same report.

Your export
A zip straight from your watch account is fine — you do not need to unpack it. .fit, .gpx, .tcx or .csv.
Read-only, and one time — I pull your runs, then you can disconnect. Your files are read in this browser, not on a server.
Racing · next

Race Pace Plan

Aid-station splits with A/B/C goals — validated against how runners like you actually ran your race, not how a calculator thinks they did.

1 · Your race2 · Your goal time — or I’ll estimate it3 · Plan in your inbox
Under construction

Aid-station splits validated against the real finisher cohort. In testing behind the Progress Report. Leave your email and I’ll tell you the day it opens.

So I can find the right runner:
Don’t have the link? Skip it — I’ll search for you and confirm I found the right person before I build anything.

Reports are generated from your data, for you only. Nothing is shared or shown publicly.

Contact

Get in touch.

Interested in coaching?

One package, starting at $1,295 a month. Nothing is metered — daily analysis of every file, unlimited calls and texts with on-call responsiveness, strength programming, and up to seven private camp days a year.

It is the same coaching my professional athletes get. It is the only coaching I do.

Want me to see your training before we talk? Run the Athlete Progress Report first and mention it here — it makes the first call twice as useful.

Not about coaching?

Press, podcast guests, fellow coaches, one-off questions — email me directly. No form required.

Case Study

Coached since
What we did
UTMB Index — while coached
Per-race UTMB Index scores, races 40K+ · Source: UTMB Index
Result highlights
Full record → UTMB Index
Inside the loop

A real athlete check-in

A mid-block video review I sent to an athlete — the workout, the data, what changes next. Name redacted on screen and in audio.