Trail running training plan
Trail running training plan for 20 km and 50 km
Easy volume, one quality dose, a long that grows. How Ridgework writes a 20 km trail block and a first 50 km ultra from the peak date you pick.
Most trail weeks should feel ordinary. Conversation pace on terrain that matches the race, one quality session if you are fresh, a long that grows by minutes — not by theatre.
That is the whole product: pick the day, run the week you actually have, log what changed.
What a week looks like
Most days are easy enough to talk through. One session a week has real intensity in it once the base is there — for a 20 km, intervals at around 10 km effort on rolling ground. One long run grows by minutes, capped by the longest outing you have actually done, not by what the calendar wishes. One strength session you can do at home.
These are the weeks the planner writes for the base phase, before anything has been logged:
20 km trail · base week
- MonStrength · 40 min
- TueRest
- WedUphill walk/jog · 50 min
- ThuEasy walk/jog · 50 min
- FriRest
- SatLong easy · 90 min
- SunRest
50 km ultra · base week
- MonStrength · 40 min
- TueRest
- WedUphill walk/jog · 45 min
- ThuEasy walk/jog · 45 min
- FriRest
- SatLong easy · 90 min
- SunRest
The phases
A 20 km trail build is about ten weeks: five of easy running with a long run that grows gradually, four with one quality session a week and long runs on race-like terrain, then one week of taper — volume down, a few short strides, rest.
A first 50 km wants more base. The full build is 24 weeks: about ten of aerobic base, twelve race-specific with long runs on terrain that resembles the course and practice with the food and pack you will use, then a taper where the last two weeks are about sleep, kit and not inventing anything new.
With less time the plan still writes. It cuts base first and keeps the specific block and the taper, rather than pretending fitness appears faster.
When the week goes sideways
Fatigue is a training input. Sleep collapsed? The quality session becomes easy. Knee at 2/10? Flatten the long. A missed session is not stacked onto the next day, and the peak date does not move unless you move it.
Questions
How long does it take to train for a 20K trail race?
Ten weeks: five of base, four specific, one taper week. If your race is sooner, the plan cuts base and keeps the specific block and taper.
How long does it take to train for a 50K?
The full block here is 24 weeks: about 10 weeks of aerobic base, 12 specific, and a 2-week taper. A shorter window still writes a plan — it just cuts base first rather than pretending fitness appears faster.
How long should my long run be?
Toward 90 to 110 minutes, capped by the longest outing you reported in setup. The plan will not jump you from 40 minutes to two hours because the calendar says week six.
How many days a week will I run?
You choose the days you can train in setup, minimum two. The week is placed on those days — rest goes on the days you said you cannot train, not on the days a template assumed.
What happens if I miss a week?
Nothing is stacked to catch up. A missed session is logged, the next days are rewritten around the fatigue you reported, and the race date stays where you put it.
Now put your own date in
This guide opens a week the planner would actually write. Change the date if yours is different. The ready date stays.
See that week →The whole block behind this week: 20K trail race training plan
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