20K trail training plan
Here is the preparation structure Endu generates for an athlete at intermediate level targeting a 20K trail in 11 weeks, training 4 times a week. Your plan will be calibrated on your level, your available days and your feedback after every session.
Variations of this plan
- weeks
- 11
- sessions
- 40
- sessions / week
- 3.6
- peak week
- 5 h
Plan structure
Periodised in phases: build the base, move to race-specific work, then taper before the race.
- BaseWeeks 1–3 · 3 wk
- BuildWeeks 4–5 · 2 wk
- SpecificWeeks 6–8 · 3 wk
- TaperWeeks 9–10 · 2 wk
- Race weekWeeks 11–11 · 1 wk
Volume progression
Week by week: lighter recovery weeks are built in to absorb the load.
| Wk | Phase | Hours | km | Elev. |
|---|---|---|---|---|
| 1 | Base | 2.9 h | 21 | 231 m |
| 2 | Base | 3.3 h | 24 | 282 m |
| 3 | Base | 3.6 h | 26 | 431 m |
| 4 | Buildrecovery | 2.8 h | 20 | 213 m |
| 5 | Build | 4 h | 28 | 567 m |
| 6 | Specific | 4.4 h | 32 | 486 m |
| 7 | Specific | 4.7 h | 34 | 514 m |
| 8 | Specific | 5 h | 37 | 540 m |
| 9 | Taper | 3.6 h | 27 | 342 m |
| 10 | Taper | 2.8 h | 20 | 114 m |
| 11 | Race week | 2 h | 16 | 17 m |
Sample week — week 6 (Specific)
Real sessions from the plan with their targets. Each session is detailed step by step and exportable as .fit.
- MondayEasy🏔️ Easy trail run 30min — rolling terrain (~81m climb)30 min · 3.5 km
- TuesdayHard🏔️ Long hills 3×8min1 h 13 · 9.7 km
- FridayModerate🏔️ Downhill technique 44min (38m climb)44 min · 5.9 km
- SundayEasy🏔️ Long trail run ~13.0km with 270m climbing1 h 56 · 13 km
Example generated for a intermediate-level profile (VMA 15 km/h, 4 sessions/week). Your plan will depend on your level, availability and feedback.
Why this plan works
Science-based periodisation
Base → build → specific → taper, with a recovery week every 3 to 4 weeks. Load goes up, but never two hard weeks in a row without a breather.
Paces, not vague feelings
Every session has target zones (pace, HR) computed from your VMA or a reference performance. A VMA test is built into the plan if you don't know yours.
Elevation as the central variable
Weekly climbing volume, long hilly runs, downhill technique and power-hiking for ultras: a trail plan is not a road plan with bumps.
A plan that listens
After each session you rate how it felt (RPE). Too hard? The plan eases what follows. Skipped a session? It reschedules or absorbs it.
On your watch
.fit export compatible with Garmin, Coros, Suunto, Polar: the guided workout shows up on your wrist, step by step.
Your plan, not a template athlete's
This plan is generated for an athlete at intermediate level training 4 times a week. Yours will be calibrated on your VMA, your available days and your feedback after every session. 3 minutes. 14-day trial, cancel anytime.
Create my plan for 20K trailFrequently asked questions
- How many weeks to prepare for 20K trail?
- For an athlete at intermediate level, Endu builds a 11-week preparation. If your race is closer, the plan compresses phases while keeping the taper; if it's further away, it extends the base phase.
- How many sessions per week?
- This example has 3.6 sessions per week. You choose 3 to 7 training days and the exact days (e.g. Tue, Thu, Sat, Sun): the plan sticks to them.
- I'm a beginner, is this plan for me?
- The plan adapts to your declared level (beginner to semi-pro): starting volume, progression and intensity change. Endu also offers a "Discovery" mode without a race to build a base first.
- Can I follow sessions on my watch?
- Yes: every session exports as .fit, the format read by Garmin, Coros, Suunto, Polar and Wahoo. Import it in your watch app and the guided workout appears on your wrist.
- How much does it cost?
- 14-day free trial, then €7.99/month with no commitment or €59.88/year (€4.99/month). Unlimited objectives and sports.