26weeks.ai - Adaptive AI Coach | 24-Week 50K Ultra Training Plan

Your training plan

Start with the weeks, not the fine print

See what each week is trying to achieve, then choose the number of training days that fits your life. The schedule comes first; workouts, adjustments, and calculators are below it.

Start at week 1

Length: 24 weeks
Frequency: 4–7 days
Easy session: ~50 min
Long session: ~3 hr

Check readiness and safety before week 1

This plan starts from

• You can complete 60–90 minutes easy without breaking down.
• You’re willing to train by time-on-feet (not ego pace).

Pause and reassess when

• Recurring overuse pain under volume.
• Inability to recover from long sessions (fix sleep/stress first).

This is general training information, not medical advice.

Week by week

Your 24-week plan

Start with the first phase. Open later phases when you are ready for them. Each week shows the long session, priority work, and a load guide when one is available.

Base
Weeks 1–7
Build time-on-feet and durability; keep it easy.
Build
Weeks 8–16
Add terrain specificity and back-to-back durability.
Peak
Weeks 17–21
Race-specific long sessions + cutoff-aware pacing.
Taper
Weeks 22–24
Reduce load; keep a touch of specificity; arrive healthy.

BaseWeeks 1–7

View 7 weeks

Build time-on-feet and durability; keep it easy.

Opens with: Long easy time-on-feet (trail/road) + hiking practice · 1 cutback week

Week
1
Base
Build time-on-feet and durability; keep it easy.
Long session
Long easy time-on-feet (trail/road) + hiking practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 4 hr 30 min–7 hr 16 min
Week
2
Base
Build time-on-feet and durability; keep it easy.
Long session
Long easy time-on-feet (trail/road) + hiking practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 4 hr 40 min–7 hr 32 min
Week
3
Base
Build time-on-feet and durability; keep it easy.
Long session
Long easy time-on-feet (trail/road) + hiking practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 4 hr 50 min–7 hr 48 min
Week
4
BaseCutback
Build time-on-feet and durability; keep it easy.
Long session
Long easy time-on-feet (trail/road) + hiking practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 5 hr–8 hr 4 min
Week
5
Base
Build time-on-feet and durability; keep it easy.
Long session
Long easy time-on-feet (trail/road) + hiking practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 5 hr 10 min–8 hr 20 min
Week
6
Base
Build time-on-feet and durability; keep it easy.
Long session
Long easy time-on-feet (trail/road) + hiking practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 5 hr 20 min–8 hr 36 min
Week
7
Base
Build time-on-feet and durability; keep it easy.
Long session
Long easy time-on-feet (trail/road) + hiking practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 5 hr 30 min–8 hr 52 min

BuildWeeks 8–16

View 9 weeks

Add terrain specificity and back-to-back durability.

Opens with: Back-to-back long sessions (scaled) + fueling rehearsal · 3 cutback weeks

Week
8
BuildCutback
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 5 hr 40 min–9 hr 8 min
Week
9
Build
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 5 hr 50 min–9 hr 24 min
Week
10
Build
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 6 hr–9 hr 40 min
Week
11
Build
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 6 hr 10 min–9 hr 56 min
Week
12
BuildCutback
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 6 hr 20 min–10 hr 12 min
Week
13
Build
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 6 hr 30 min–10 hr 28 min
Week
14
Build
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 6 hr 40 min–10 hr 44 min
Week
15
Build
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 6 hr 50 min–11 hr
Week
16
BuildCutback
Add terrain specificity and back-to-back durability.
Long session
Back-to-back long sessions (scaled) + fueling rehearsal
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 7 hr–11 hr 16 min

PeakWeeks 17–21

View 5 weeks

Race-specific long sessions + cutoff-aware pacing.

Opens with: Key long session with terrain focus + cutoff pacing practice · 1 cutback week

Week
17
Peak
Race-specific long sessions + cutoff-aware pacing.
Long session
Key long session with terrain focus + cutoff pacing practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 7 hr 10 min–11 hr 32 min
Week
18
Peak
Race-specific long sessions + cutoff-aware pacing.
Long session
Key long session with terrain focus + cutoff pacing practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 7 hr 20 min–11 hr 48 min
Week
19
Peak
Race-specific long sessions + cutoff-aware pacing.
Long session
Key long session with terrain focus + cutoff pacing practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 7 hr 30 min–12 hr 4 min
Week
20
PeakCutback
Race-specific long sessions + cutoff-aware pacing.
Long session
Key long session with terrain focus + cutoff pacing practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 7 hr 40 min–12 hr 20 min
Week
21
Peak
Race-specific long sessions + cutoff-aware pacing.
Long session
Key long session with terrain focus + cutoff pacing practice
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 7 hr 50 min–12 hr 36 min

TaperWeeks 22–24

View 3 weeks

Reduce load; keep a touch of specificity; arrive healthy.

Opens with: Shorter long session + mobility

Week
22
Taper
Reduce load; keep a touch of specificity; arrive healthy.
Long session
Shorter long session + mobility
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 8 hr–12 hr 52 min
Week
23
Taper
Reduce load; keep a touch of specificity; arrive healthy.
Long session
Shorter long session + mobility
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 8 hr 10 min–13 hr 8 min
Week
24
Taper
Reduce load; keep a touch of specificity; arrive healthy.
Long session
Shorter long session + mobility
Priority sessions
Hills (controlled) + hiking efficiency · Back-to-back long sessions (scaled)
Weekly load guide: 8 hr 20 min–13 hr 24 min

Weekly schedule

Choose the rhythm you can repeat

The phase progression stays the same. Your choice only changes how you spread the priority sessions, easy work, and recovery across the week.

4 days/week (Beginner-friendly)

4 days/week · Beginner

• Consistency and durability first.

5 days/week (Balanced week)

5 days/week · Intermediate

• Includes one hills session and one long-session focus.

6 days/week (Advanced)

6 days/week · Advanced

• Only if recovery is stable; keep intensity controlled.

Adjust the plan

What changed this week?

Open the situation that matches your week. Do not cram missed work into the next few days.

Missed workout

• Protect the long session; drop extra intensity.
• Don’t stack back-to-backs to ‘catch up’.

Low sleep week

• Keep it easy; reduce long-session duration by 15–25%.
• Replace hills with hiking if needed.

Fatigue signals

• If legs feel dead, replace with easy hike and mobility.
• Prioritize fueling and sleep; treat it like a cutback week.

Pain or injury

• Pain that changes gait is a stop signal.
• Swap to hiking/biking until pain-free; return gradually.

Travel week

• Short sessions win: keep one long hike/run and one hills touch if possible.
• Use time-based training and stay consistent.

Workout guide

Understand the sessions in the plan

Use this as a reference when a workout name appears in your week. You do not need to read every entry before starting.

Time-on-feet long session

Why: Build durable endurance without over-focusing on pace.

Do: 90–180+ minutes easy. Include hiking on climbs if terrain demands it.

Swap with

• Split into two sessions on high-stress weeks; keep total time similar.

Stop or scale back when

• Sharp pain that changes form.
• Needing multiple days to recover every week.

Back-to-back long sessions (scaled)

Why: Train durability and pacing under accumulated fatigue.

Do: Two consecutive days: long easy + medium easy. Keep both controlled and finish feeling stable.

Swap with

• If injury-prone: one long run + one long hike.

Stop or scale back when

• Turning day 2 into a race.
• Fatigue that spills into the entire next week.

Hills (controlled) + hiking practice

Why: Build climbing efficiency and downhill resilience safely.

Do: 6–12 × 2–4 min uphill at controlled effort; hike steep reps. Jog easy down.

Swap with

• Stair climbing or incline treadmill if needed.

Stop or scale back when

• Knee pain on descents.
• Over-striding downhill.

Cutoff pacing rehearsal

Why: Practice pacing that keeps you safe against cutoffs without burning matches.

Do: 60–120 min with segments at your cutoff-safe effort. Practice aid-station efficiency (quick in/out).

Swap with

• Do it as a hike-run combo on trails.

Stop or scale back when

• Chasing pace on terrain that demands hiking.
• Skipping fueling while ‘testing’ pace.

Fueling practice (GI-friendly)

Why: Train your gut and reduce race-day surprises.

Do: On long sessions: practice a simple schedule and adjust products if GI issues appear.

Swap with

• Lower intensity + smaller doses if tolerance is low.

Stop or scale back when

• Repeated GI distress without changes.
• Ignoring hydration in heat.

Strength durability (lower-body + trunk)

Why: Support downhill resilience and long-duration posture.

Do: 2×/week, 25–40 min: single-leg, posterior chain, calves, trunk. Avoid soreness spikes.

Swap with

• Travel circuit with step-ups, calf raises, core.

Stop or scale back when

• DOMS ruining long sessions.
• Sharp joint pain.

More guidance

Read schedule examples and special cases

Open this for day-of-week examples, run/walk options, goal-specific notes, and useful links.

Decide whether this 24-week 50K plan fits

A 24-week 50K plan fits only when its opening long run, weekly duration, terrain, and recovery resemble work you can repeat. Twenty-four weeks should create a patient foundation and disruption margin, not a longer peak. More calendar does not make a sudden jump in climbing, descending, technical terrain, night running, or back-to-back work safe.

Translate the event into verified demands

Demand	Evidence to collect	Plan response
Distance and likely time	current durable duration	progress time on feet gradually
Terrain	surface, climb, descent, altitude	rehearse the verified limiter
Aid and cutoffs	current organizer guide	build a checkpoint and buffer plan
Equipment	mandatory and optional kit	test fit and use before race week
Recovery	symptoms and next-day function	progress, hold, reduce, or replace

The organizer owns course, cutoff, crew, pacer, drop-bag, mandatory-kit, and assistance rules. Re-open the athlete guide before building a logistics rehearsal.

Give the runway four jobs

Foundation: stabilize frequency, strength, hiking where relevant, and easy time on feet.
Durability: extend one major variable at a time while ordinary recovery remains intact.
Specificity: Build a bounded long-run, kit, fueling, night, or crew rehearsal only when the event requires it.
Taper: reduce fatigue, retain familiar movement, and finalize only verified logistics.

Ultramarathon nutrition guidance supports individualized, rehearsed plans rather than one menu or intake target. Record what you consumed, conditions, gastrointestinal response, energy, fluid access, and what changed.

Make back-to-back work earn its place

A back-to-back weekend can answer a course-specific durability question, but it is not mandatory proof of toughness. Use it only when the second session has a defined job and the following week still works. If movement, sleep, mood, appetite, or normal function deteriorates for several days, reduce the combined cost.

Use one weekly decision

Record completed duration, climbing and descending, surface, perceived effort, symptoms, fueling, fluid, pack or shoe changes, sleep opportunity, and next-day function. Change one large demand at a time. Do not increase long-run duration, vert, technical exposure, and intensity together merely because the template permits it.

Use the ultra training hub, ultra cutoff planner, long-run progression guide, and aid-station rehearsal to connect the plan with course decisions.

Safety boundary

Stop and seek qualified help for chest pain, fainting, confusion, severe breathing difficulty, heat-illness signs, inability to stay warm, or pain that makes movement unsafe. This plan is educational and not medical advice, a diagnosis, or a finish guarantee.

Tools

Use numbers only when they help the plan

Start with the weekly schedule. Use a calculator when you need pace, fueling, cutoff, or printable-plan details.

Ultra cutoff plannerOpen the tool with this plan’s defaults.Fueling schedule plannerOpen the tool with this plan’s defaults.

Use interactive calculators on this page

Calculator

Ultra cutoff planner

Compute the minimum average pace to beat a cutoff, and sanity-check your buffer with a planned pace.

Distance

Cutoff time

Planned pace (sec per km)

Example: 420 sec per km = 7:00/km.

Required pace (km)

9:36

Planned finish

—

Buffer vs cutoff

—

Limitation: this ignores elevation, trail surface, aid-station stoppage, and mandatory gear transitions. Use it as a baseline, then add margin.

Loading cutoff planner…

Planner

Marathon fueling schedule

A simple, repeatable plan: pick a carb target, then schedule doses you can actually execute while running.

Finish time

Carbs per hour (g/h)

Dose interval (min)

Carbs per gel (g)

Total time

3:45:00

Total carbs

281 g

Approx gels

12 gels

Simple schedule

Take a dose every 20 minutes. In training, practice the same timing so race day is automatic.

20m40m60m80m100m120m140m160m180m200m220m

Safety note: fueling targets vary by athlete and conditions. Practice in training and adjust if you get GI distress. This is not medical advice.

Loading fueling planner…

Why this structure

The principles behind the plan

Ultras reward time-on-feet and durability, not heroic pace sessions.
Back-to-back sessions train fatigue resistance safely when scaled.
Cutoff planning is a pacing skill; train it like a discipline.
Fueling and hydration are part of the training plan, not a race-week afterthought.

Adaptive AI coach for iPhone

Let your coach adapt the plan.

Your adaptive AI coach reviews completed work and adjusts upcoming sessions after missed training, poor sleep, unusual fatigue, or a disrupted week.

Start training now

FAQs

Is 24 weeks enough for a 50K?

It depends on whether the opening weeks match current durable training, terrain skill, and recovery. Add runway instead of skipping into peak work.

Do I need back-to-back long runs?

No. Use them selectively when they answer a course-specific question and the second session plus following week remain useful.

How much climbing should I do?

Use the verified course and current terrain tolerance. Add climbing and descending gradually rather than copying another athlete's total.

Should I practise at night?

Only when the event requires it and after lighting, route, weather, company, and safety support are planned.

What if I miss a long run?

Do not automatically stack it beside the next key session. Resume from current capacity and protect continuity.

Can this plan predict a finish?

No. Health, weather, course changes, rules, pacing, nutrition, equipment, navigation, and race-day decisions remain uncertain.

Keep going

Ultra Training Plans: Choose 50K to 100 Miles

Choose an ultra plan by distance, terrain, base, recovery and available weeks before building long-run specificity.

Open guide

50K Training Plan PDF: Match the Course and Runway

Choose a 50K plan PDF by current base, course terrain, long-run recovery, fueling practice and available weeks.

Open guide

Ultra Cutoff Planner

Compute the minimum average pace to beat an ultra cutoff and sanity-check your buffer with a planned pace.

Open guide

Start with the weeks, not the fine print

This plan starts from

Pause and reassess when

Your 24-week plan

Build time-on-feet and durability; keep it easy.

Build time-on-feet and durability; keep it easy.

Build time-on-feet and durability; keep it easy.

Build time-on-feet and durability; keep it easy.

Build time-on-feet and durability; keep it easy.

Build time-on-feet and durability; keep it easy.

Build time-on-feet and durability; keep it easy.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Add terrain specificity and back-to-back durability.

Race-specific long sessions + cutoff-aware pacing.

Race-specific long sessions + cutoff-aware pacing.

Race-specific long sessions + cutoff-aware pacing.

Race-specific long sessions + cutoff-aware pacing.

Race-specific long sessions + cutoff-aware pacing.

Reduce load; keep a touch of specificity; arrive healthy.

Reduce load; keep a touch of specificity; arrive healthy.

Reduce load; keep a touch of specificity; arrive healthy.

Choose the rhythm you can repeat

4 days/week (Beginner-friendly)

5 days/week (Balanced week)

6 days/week (Advanced)

What changed this week?

Understand the sessions in the plan

Swap with

Stop or scale back when

Swap with

Stop or scale back when

Swap with

Stop or scale back when

Swap with

Stop or scale back when

Swap with

Stop or scale back when

Swap with

Stop or scale back when

Read schedule examples and special cases

Decide whether this 24-week 50K plan fits

Translate the event into verified demands

Give the runway four jobs

Make back-to-back work earn its place

Use one weekly decision

Safety boundary

Use numbers only when they help the plan

Ultra cutoff planner

Marathon fueling schedule

Simple schedule

The principles behind the plan

Let your coach adapt the plan.

FAQs

Keep going

Ultra Training Plans: Choose 50K to 100 Miles

50K Training Plan PDF: Match the Course and Runway

Ultra Cutoff Planner

Sources

Ultra cutoff planner

Marathon fueling schedule

Simple schedule