Paris Half Marathon
training plan
An adaptive half marathon plan for a flat course on road, run in cool March conditions, built around the three things Paris actually asks of you: cobbles underfoot, a build through winter and a cold start. Twelve 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 12-week half marathon plan gets you to the start line. It has no idea about cobbles underfoot, a build through winter or a cold start.
On the ground, Paris is a flat course on road. It is usually held in March, when conditions are usually cool, which is good racing weather but means a cold twenty minutes standing about beforehand. So over a half marathon, pacing discipline decides your day, and the weather is more likely to help you than to hurt you. There will be tens of thousands starters out there with you.
- Profile
- Flat · road
- Usual conditions
- March · cool
- Race season
- Spring, northern hemisphere
- Field
- Large · tens of thousands
Short sections of the course are not tarmac
A few hundred meters of cobbles or setts in the middle of a race does more damage than the distance suggests: the stride shortens, the ankles work overtime, and every landing arrives slightly wrong.
Ankle and foot strength from the first block, and long sessions that put uneven ground in deliberately, so the rough sections of Paris cost you a few seconds rather than the rest of your race.
You are training through the worst of the weather
A build that runs through the dark months means ice, treadmills, whatever is going around the office, and a work trip nobody warned you about. Plans die here, in the weeks that get missed.
Three taps to say you are sick, traveling or hurting, and the block rebuilds around it. No message to send, nobody to explain yourself to, nothing quietly abandoned.
You will stand in the cold before you ever move
A cold start means a long wait in a start pen, a warm-up that goes stale, and muscles that are not ready when the gun goes. The first section costs more than it should, and you spend the rest of the day getting it back.
A race-morning routine built for waiting: a warm-up that can be repeated, throwaway layers, and an opening section paced for legs that are still coming to.
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.
First come, first served
Places usually go on general sale and disappear on a timetable rather than a draw, so the date you can control is the one you start on. Twelve weeks back from March puts the first week in late December.
Large field
A large field means a start pen, a gun time that is not your chip time, and a first mile you do not control, and on flat ground the first few miles are run at whatever pace the people around you have chosen. Over a half marathon, that is a long time to be running somebody else's race.
Road
Road, which is the easy part to train for and the easy part to get wrong: the same shoes, the same socks and the same drink you intend to race in, used often enough that race morning contains no first times. The peak week puts goal-pace blocks on it, months before March.
You will be training through the northern winter
Work backwards and a twelve-week block for a March race opens around late December, running December through to March. That is the northern winter, and it is the half of the job most plans never mention. Most of your long sessions will start or finish in the dark, in weather that makes the warm-up longer than the session. Ice takes the pace out of your hands, a chest infection goes round in week six, and the treadmill stops being a punishment and starts being a tool. And the last block lands in March, with flat ground, cool conditions and a large field waiting at the end of it.
So the plan swaps outdoor quality for treadmill or turbo equivalents by effort rather than pace when the ground is unrunnable, and treats a week lost to illness as a rebuild rather than a hole to run through. Whatever the season takes out of two weeks, the work for cobbles underfoot, a build through winter and a cold start is what the rebuild puts back first.
- Weeks 1-5 December-January dark, cold and interrupted, so showing up matters more than intensity
- Weeks 6-7 January-February
- Weeks 8-12 · peak and taper February-March the weather turns mid-block; the ramp holds steady anyway
Months assume Paris keeps its usual March slot and that you take the full 12 weeks. Adaptlete builds from the date you enter.
A real week from a Paris build
This is the shape of the biggest week in 12: 4-5 runs a week, 5H 18M of training, and one session that matters more than the rest. Two of them are here because of this course and not the distance: goal-pace blocks for the flat profile, and a cold-start rehearsal for conditions that are usually cool. For a March race, week 8 lands in February. 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 | Goal-pace blocks: 3 × 15 min at race pace | 11 km55' |
| WED | Zone 2, easy | Easy run | 8 km42' |
| THU | Zone 3, steady | Strength: hips & calves | 40' |
| FRI | Zone 1, recovery | Cold-start rehearsal: race effort inside the first ten minutes, from cold | 6 km34' |
| SAT | Zone 3, steady | Long run: the last 4 mi at race pace | 23 km1H45 |
| SUN | Zone 2, easy | Easy run + strides | 8 km42' |
Something will go wrong.
That is the part we built for.
Nobody finishes a twelve-week build without missing a week, and December through to March 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 7
Hotel treadmill, nothing else? Those days get rewritten around it.
Flu in January
The block rebuilds and ramps you back. Nothing is deleted.
A niggle at week 8
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 Paris Half Marathon?
Twelve weeks is the usual build for a half marathon like Paris, at 4-5 runs a week. Counted back from a March race that opens the block around late December and runs it December through to March. 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 cobbles underfoot, a build through winter and a cold start first, and tells you plainly what it had to leave out.
When should I start training for Paris Half Marathon?
Paris is usually held in March, and the next edition an athlete could realistically build for is Spring 2027. Count back twelve weeks from whatever date you enter and the block opens around late December, running December through to March. Adaptlete builds backwards from your date, so the whole half marathon plan lines itself up the moment the date is confirmed. Entry runs on a separate clock (places here are first come, first served), and the training deadline is the one you control.
Is Paris Half Marathon really as fast as people say?
A flat course on road, and in March conditions are usually cool, which is good racing weather but means a cold twenty minutes standing about beforehand. So pacing discipline decides your day, and the weather is more likely to help you than to hurt you. That combination is what the twelve weeks are built around: cobbles underfoot, a build through winter and a cold start. The half marathon on its own would give you a completely different plan.
How do I keep a Paris Half Marathon build going through the winter?
A twelve-week block ending in March runs December through to March, which is the northern winter. Most of the long sessions start or finish in the dark, ice takes the pace out of your hands, and something goes around the office in the middle third. The plan swaps outdoor quality for treadmill or turbo work by effort rather than pace when the ground is unrunnable, and treats a week lost to illness as a rebuild instead of a hole to run through.
Does the surface at Paris Half Marathon need its own training?
Yes, and it is the part people leave until race week. Road, which is the easy part to train for and the easy part to get wrong: the same shoes, the same socks and the same drink you intend to race in, used often enough that race morning contains no first times. Over a half marathon on flat ground the rough sections cost more than their length suggests, so the twelve-week block puts uneven footing into the long sessions deliberately rather than hoping March is kind.
Is Paris Half Marathon a good course for a personal best?
It is a flat course, run in March when conditions are usually cool, which is good racing weather but means a cold twenty minutes standing about beforehand. That is why people target it and why so many go out too hard. The plan works backwards from the pace you want, rehearses it in long blocks inside the long session across twelve weeks, and tells you plainly when your recent training does not support the number. What it will not do is drop cobbles underfoot, a build through winter and a cold start to chase it.
Is this an official Paris Half Marathon training plan?
No. Adaptlete is an independent training-plan service with no affiliation to the organizers of Paris Half Marathon, 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.