The trail running training plan: climb, descend, and go the distance

A trail race isn't run like a road race. You walk the steep climbs, you absorb the descents, you count in hours rather than kilometers. Your plan keeps the base of running race prep — easy running, a fast session, a long run — and gears it to the terrain: hills, and long runs on hilly routes.

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The five rules of trail running

They come from research on uphill and downhill running and from the practice of trail coaches.

Walking uphill isn't a weakness. Beyond a certain gradient, walking costs less energy than running. The best trail runners walk the steep sections, and they train for it.

Downhill takes preparation. It's what wrecks your thighs: the muscle brakes while lengthening. The best protection we know of is getting used to it before the race.

You count in time, not kilometers. A kilometer of climbing and a kilometer of flat have nothing in common. On trails, the duration of the effort is the reliable benchmark.

Hills are the trail runner's MAS work. Short and powerful, they build the strength and the stride that climbs demand.

Do your long run on the trails. At least from time to time on a hilly route: that's where your legs learn to link climbs and descents.

Road or trail: what changes

The base is the same. It's the way you train it that differs.

	On the road	On the trail
The benchmark	Kilometers and pace	Time and elevation gain
Hills	Just part of the course	A session in their own right
Walking	Rarely	A strategy on steep slopes
Downhill	Rarely trained	To prepare for: it's what tires your thighs
The long run	On the flat, at a steady pace	On a hilly route, by effort

For building elevation gain week after week, there is no numerical standard: coaches' plans rely on experience. What is established is the value of walking uphill and of exposure to downhill running.

What your plan adds when you prepare for a trail race

When you create your plan, you choose the terrain for each session: Road, Track, Trail or Hills. The plan places and builds its sessions accordingly.

Hills

Your fast session moves uphill: short efforts, from 30 seconds to 2 minutes, for power, and 6 to 8 minute blocks to sustain the effort over time. You climb by feel or by heart rate, and you recover on the way back down.

The hilly long run

Some of your long runs take place on a hilly route, at an easy pace: it's the session that best prepares you for the climbs and descents of the race.

The endurance base

Easy runs, a recovery week every four weeks, a two-week taper before the race: trail running rests on the same base as road running.

Training for elevation gain without mountains?

It's possible. A hill a few hundred meters long repeated several times, a staircase, a multi-story parking garage, an inclined treadmill: what counts is linking climb and descent, not the height of the summit. And downhill running can be trained in town too, at a controlled pace.

The five costly mistakes on trails

Trying to run every climb. On steep slopes, running burns the energy you'll need later. Power hiking, hands on thighs, is often faster and always more economical.

Neglecting the downhill. It's what leaves your thighs shattered after the race, and sometimes during it. You prepare for it beforehand, not on race day.

Training only on the flat. Even with good long runs, legs that have never climbed or descended discover the terrain at the worst moment.

Thinking in pace per kilometer. On a trail, pace means nothing. Effort, on the other hand, remains the right benchmark.

Trying something new on race day. Poles, pack, fueling, shoes: everything gets tested on your long runs.

Where these numbers come from

The rules on this page come from published research on uphill and downhill running.

The economy of walking uphill: beyond a threshold gradient, walking costs less energy than running (Minetti, Journal of Applied Physiology, 2002; Giovanelli, European Journal of Applied Physiology, 2016).

Poles slightly reduce energy cost on steep slopes, and clearly reduce perceived effort (Giovanelli, 2019).

Downhill running: eccentric work causes most of the muscle damage, the least accustomed runners suffer the most from it, and exposure before the race is the best known prevention (review by Bontemps, Sports Medicine, 2020).

The questions runners ask before a trail race

How do you move from road to trail?

Gradually, keeping your running base. When you create your plan, you choose the terrain for each day. The Trail day hosts your long run, on a hilly route every other week, guided by heart rate or by feel rather than by pace. The Hills day turns your fast session into uphill work. Your other days stay on the road, so you keep your pace benchmarks.

Should you walk uphill?

Yes, as soon as the slope gets steep. Walking there costs less energy than running, and the best trail runners do it. What you train is a brisk, active power hike.

How do you train for downhill?

By running downhill, quite simply, and regularly: not too fast at first, short stride, eyes far ahead. Your body adapts to the braking effort within a few weeks; that's why you need to start well before the race.

Are poles useful?

On steep slopes, they slightly reduce energy use and clearly reduce the sense of effort. They take practice: if you plan to use them in the race, take them on your long runs.

How many weeks for a first 20 to 30 km trail race?

Around twelve, for a runner who can already run for an hour comfortably. Your plan fits your race date and starts from your current volume.

Which shoes?

Trail shoes, which grip and protect your feet, become useful as soon as the trails are technical or wet. On wide, dry paths, your road shoes can be enough to start with.

Is it free?

Yes, for the essentials: creating your plan, taking it with you as a PDF, and running each session with voice guidance. A subscription is available for advanced features — automatic plan adjustments week after week, a written analysis of each session. The plan itself doesn't need it.