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Do your races work together? Every verdict comes from the course facts and from how much of one race's preparation carries over to the next. Nothing is saved unless you keep it in your account: your season lives in this page's address.

Your running: 45 km/week · 22 km longest · 5 days · mixed terrain · some experience

0 of 1 races have the preparation they need. Arc of Attrition by UTMB Arc 100M is the one to look at.

Sep 26 NovDecJan 27FebMar
off-season basebuildingtaperracerecovery
Not building
39%
Longest build
14 wk
Racing descent
5.5k m
Off-season
4 wk

Arc of Attrition by UTMB Arc 100M

Not as a goal

· 173 km, +5,507 m · 28.2–39.2 h on your feet · 6 wk easy running after

32 m of climb per km — steep enough that most runners hike the longer climbs.

Course, cutoffs and race-day guide · Training volume does not certify the technical alpine skills, self-support or intermediate cutoffs this race asks for: check them on the race page.

Only 16 weeks before it, where your build needs 24.

What would change this: build your long run to about 28 km before the block begins, or finish a 50–80 km race first; if your longest recent run is already longer than 22 km, say so under “your running”; or if you have raced this distance before, say so under “your running” — an experienced runner needs a shorter build than the generic one; or a higher current weekly volume shortens the build this race needs; or a shorter distance at the same event, or a later edition.

The 24 weeks before it — a full build Not enough

the dark row marks weeks with real climbing in them

14 wk building for this race
24 wk is a full build for you
2 wk tapering, racing or recovering — building nothing
weeks with climbing: 14, the number this course asks for · descent work: 14 weeks, enough

Your training

27 weeks, starting this week
What do I do today?

Calendar

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Keep this season in your account

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This week · Arc of Attrition by UTMB Arc 100M — base building 1 of 14

5h 15m of running · 650 m of climbing

  • Tue Easy hills + uphill strides 50m +225 m · Easy; strides strong but relaxed
  • Tue Strength (optional) 30m · Moderate: controlled reps, stop 1–2 short of failure
  • Wed Easy run 40m · Easy
  • Fri Easy run 40m · Easy
  • Sat Long run 2h 20m +325 m · Easy
  • Sun Recovery run or hike 45m +100 m · Very easy

Next week: Arc of Attrition by UTMB Arc 100M — base building 2 of 14 · 5h 35m

What you could change

In the order most runners prefer: keep the trip if you can, drop the race last.

  • change distance Take a shorter distance at the same event as Arc of Attrition by UTMB Arc 100M. It keeps the trip and the entry, and a shorter race costs less recovery while transferring nearly as much preparation.

One coherent season: each demanding race gets its own build, taper and recovery; shorter races are placed inside a build. Recovery spacing and carry-over are reviewed product conventions calibrated against our reference plans, not physiological measurements. Planning guidance from course facts and your stated training — not medical or coaching advice. Recovery spacing, how much preparation carries over, and how many climbing weeks a course asks for are our own reviewed conventions — inspectable, and not measurements of your physiology.