Ultra Trail Training Plan (50K+)
A 12-week plan for 50K-and-up ultra distances, combining trail running with climbing-focused indoor cycling strength work to build vertical endurance and fatigue resistance.
Ultras are won on the climbs and lost to accumulated fatigue — this 12-week plan pairs your trail running with indoor cycling sessions built specifically for climbing strength and time-on-feet endurance, so you build the vertical power and multi-hour fatigue resistance that flat road training simply can't provide.
This plan is dynamic
Every cycling session in this plan automatically scales its power targets to your FTP, so it adapts as you get fitter — no need to guess your numbers or redo the math yourself. Life happens too: drag any session to a different day on your calendar whenever your routine changes.
Week-by-week breakdown
Aerobic Base
Weeks 1–4Building a big aerobic base across both trail runs and Zone 2 cycling volume.
Climbing Strength
Weeks 5–8Torque-focused, low-cadence cycling sessions that build the muscular strength climbs demand.
Time on Feet Simulation
Weeks 9–11Longer efforts that simulate the sustained fatigue of race day, on trail and bike alike.
Taper
Week 12A short, easy week that lets your legs absorb the training before race day.
Frequently asked questions
How does cycling help with trail running and climbing?
Low-cadence, high-torque cycling intervals build the same muscular endurance your legs need for sustained climbs, with far less impact than extra running miles.
Is this plan for a specific distance?
It's built around the demands of long trail races and ultras generally (50K+) — adjust weekly volume up or down based on your target distance.