Western States 100
training plan
An adaptive 100 mile plan for a mountain course on trail, run in unpredictable June conditions, built around the three things Western States 100 actually asks of you: heat, quad-wrecking descents and cut-off times. Twenty-four weeks written two at a time, from what you actually did in the two weeks before, and rewritten the moment you travel, get ill or something starts hurting.
This page describes the race and what its course, climate and date ask of a build. On Pro, the plan itself is written for you, from your experience, your weekly hours and your date, so two athletes entered in this race get different plans.
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Three demands, three answers
A generic 24-week 100 mile plan gets you to the start line. It has no idea about heat, quad-wrecking descents or cut-off times.
On the ground, Western States 100 is a mountain course on trail, with 5,500 m of climbing in it. It is usually held in June, when the weather is genuinely unpredictable, and two editions running rarely feel the same. So over a 100 mile race, the vertical is the event and the distance is how long you are out in it, and the weather is the variable you prepare for, because nobody can plan around it. There will be a few hundred to a thousand starters out there with you.
- Profile
- Mountainous · trail
- Climbing
- 5,500 m · 55 m in every mile
- Usual conditions
- June · unpredictable
- Race season
- Summer, northern hemisphere
- Field
- Small · a few hundred to a thousand
Heat will cost you more than the course does
Warm, still air moves your heart rate up for no extra speed and turns a sensible pace into an unsustainable one. Fluid and sodium losses that seemed trivial in training become the reason you slow down.
Heat sessions in the last block, pacing set by effort rather than the number on your watch, and a fueling plan for Western States 100 that you rehearse in the long session.
The descending is free speed you pay for later
Losing height early feels like a gift. It is eccentric loading, and the bill arrives with about a quarter of the race left, as quads that stop answering. Most blow-ups on a course like this come from tissue damage. Fitness is rarely the cause.
Descending reps from the first block, and long sessions that put the downhill early. Your legs meet the damage in training, well before the point of Western States 100 where it decides your day.
The clock is a competitor
Intermediate cut-offs mean you have to reach specific points by specific times, usually after the section that hurt most. Slower runners can be pulled while still moving well.
The plan works from the cut-off structure you enter, builds the durability to hold pace late, and rehearses aid-station discipline so time is not lost standing still at Western States 100.
Getting in, and getting to the line
Adaptlete has no involvement in entry, allocation or ballots for any race. This is what the format asks of your planning.
Ballot
Places usually go by ballot, which makes the honest sequence place first, plan second. If the draw goes against you, the same block moves to another race without being rewritten. Twenty-four weeks back from June puts the first week in late December.
Small field
A small field means no pens and no queues, and nobody to tuck in behind when it gets hard, and on a mountain course the queue forms at the first singletrack and never fully clears. Over a 100 mile race, that is a long time to be running somebody else's race.
Trail
Trail, so the long sessions have to happen on ground like it. Footing, poles, descending and eating while you move are skills, and none of them are learnable on a treadmill in the last two weeks. The peak week puts climbing intervals on it, months before June.
You will be training through the northern spring
Work backwards and a twenty-four-week block for a June race opens around late December, running December through to June. That is the northern spring, and it is the half of the job most plans never mention. The light comes back a little faster than the weather does, so the first block is still winter and the last one is not. It is the easiest season to train in and the easiest one to overreach in, because everything suddenly feels good at once. And the last block lands in June, with mountainous ground, unpredictable conditions and a small field waiting at the end of it.
So the plan holds the ramp down while the evenings open up, and puts the biggest weeks where the daylight actually supports them rather than where enthusiasm wants them. Whatever the season takes out of two weeks, the work for heat, quad-wrecking descents and cut-off times is what the rebuild puts back first.
- Weeks 1-10 December-March dark, cold and interrupted, so showing up matters more than intensity
- Weeks 11-16 March-April the weather turns mid-block; the ramp holds steady anyway
- Weeks 17-24 · peak and taper April-June
Months assume Western States 100 keeps its usual June slot and that you take the full 24 weeks. Adaptlete builds from the date you enter.
A real week from a Western States 100 build
This is the shape of the biggest week in 24: 6 sessions a week, 14H 30M of training, and one session that matters more than the rest. Two of them are here because of this course and not the distance: climbing intervals for the mountainous profile, and a weather rehearsal for conditions that are usually unpredictable. The key session itself is written for heat. For a June race, week 17 lands in April. Your version is written from your hours, your history and how far out you are.
- Every session says what it is for, in plain language
- Intensity you can scan down the week without reading
- Move any session to any day without breaking the block
| Day | Intensity | Session | Distance and duration |
|---|---|---|---|
| MON | Rest | Rest | |
| TUE | Zone 4, threshold | Climbing intervals: 4 × 10 min, hiking the steep sections | 10 mi1H30 |
| WED | Zone 2, easy | Weather rehearsal: it goes ahead in whatever the day hands you | 9 mi1H25 |
| THU | Zone 3, steady | Strength: eccentrics & carries | 50' |
| FRI | Rest | Rest | |
| SAT | Zone 3, steady | Long mountain day: at the hottest part of the day | 34 mi7H00 |
| SUN | Zone 2, easy | Back-to-back hike with vert | 15 mi3H45 |
Something will go wrong.
That is the part we built for.
Nobody finishes a twenty-four-week build without missing a week, and December through to June is a long time to stay lucky. The plans that fail are the ones that carry on as if nothing happened.
A work trip in week 13
Hotel treadmill, nothing else? Those days get rewritten around it.
Flu in March
The block rebuilds and ramps you back. Nothing is deleted.
A niggle at week 20
Loading comes off it, the rest of your week stays. And go see someone.
Questions people actually search
How many weeks do I need to train for Western States 100?
Twenty-four weeks is the usual build for a 100 mile race like Western States 100, at 6 sessions a week. Counted back from a June race that opens the block around late December and runs it December through to June. Coming from a lower base, give yourself longer. With fewer weeks than that the plan compresses. It builds what it can from where you are, protects the work for heat, quad-wrecking descents and cut-off times first, and tells you plainly what it had to leave out.
When should I start training for Western States 100?
The date does not move: 26 to 27 June 2027. Count back twenty-four weeks from it and that is when a full-length 100 mile build opens: around late December for a June race, December through to June. If you are reading this later than that, the plan fits the block into what is actually left and names the sessions it dropped. Entry runs on a separate clock (places here are allocated by ballot), and the training deadline is the one you control.
Do I need hills to train for Western States 100?
There is 5,500 m of climbing in it, about 55 m in every mile. That is mountainous ground on trail, over a 100 mile race, and it is trainable without moving house. The peak week carries climbing intervals and loads the long session the way the course does. Train somewhere flat and the plan substitutes sustained-effort and eccentric work that loads the same tissue, and tells you it has done so. It is one of heat, quad-wrecking descents and cut-off times, and none of the three gets dropped to make room for the others.
What kit do I need for Western States 100?
Trail, so the long sessions have to happen on ground like it. Footing, poles, descending and eating while you move are skills, and none of them are learnable on a treadmill in the last two weeks. There is 5,500 m of climbing in it, about 55 m in every mile. Over twenty-four weeks the plan puts the long sessions on ground like it and asks you to use the same pack, poles, shoes and food you intend to use in June. Check the organizers' own mandatory kit list. It is theirs, it changes, and we do not publish it.
How do I train for the heat at Western States 100?
By practicing it. The plan moves some sessions into the warmest part of the day in the final block, sets targets by effort rather than pace, and rehearses drinking and sodium in the long session so nothing about race day is new. Here that sits inside twenty-four weeks on mountainous trail for a June race, alongside quad-wrecking descents and cut-off times.
Will I be running in the dark at Western States 100?
Almost certainly, and for longer than you think. A 100 mile race on trail over mountainous ground puts most people out for at least one full night. The plan schedules head-torch sessions on real terrain rather than leaving them to the last two weeks, and the twenty-four-week block finishes long days in the dark on purpose so June is not the first time.
Is this an official Western States 100 training plan?
No. Adaptlete is an independent training-plan service with no affiliation to the organizers of Western States 100, and none is implied. We name the race because the plan is built around what its course, its format and its date ask of you.