The half marathon is the distance that turns a jogger into a runner, and a good first half marathon training plan is what turns a bucket-list line into 21.1 kilometres you actually run. Twelve weeks is all it takes — but not twelve weeks of willpower. What carries you across the line is structure: a weekly rhythm, a long-run ladder that deliberately stops short of race distance, a fixed date, two rehearsal races, a small fund, and a moment worth photographing. This guide walks through all seven, calmly, one at a time.
Which plan should a first-timer follow — and what should you be able to run before week one?
Follow a twelve-week beginner plan built on Hal Higdon's Novice 1 structure: three easy weekday runs, one long run at the weekend, and two full rest days. The single prerequisite is being able to run 5K in one go before week one. If you can't yet, spend a month getting there first.
Twelve weeks sounds short beside a marathon's eighteen, and that is exactly the point. The half asks for roughly half the load, which is why it sits where it does on so many bucket lists: far enough to mean something, close enough that an ordinary life can absorb it. Around two million people finish one every year — nearly double the number who finish a marathon. The plan below is metric-first, with distances rounded to whole kilometres, and it assumes a body that already jogs rather than one starting from zero. Everything after this section is one of the seven things worth keeping track of.
What does a training week actually look like?
Rest Monday, run Tuesday, an easy short run Wednesday, run Thursday, rest Friday, long run Saturday. Weekday runs start at 5/3/5K in week one and grow to 9/5/9K by week nine. Four runs a week, two full rest days, and nothing complicated in between.
This is your first tracked commitment: the habit of three weekday runs. The Tuesday and Thursday sessions do the real work; Wednesday is the short, gentle one that keeps the legs turning over. Treat the three as a rhythm you are protecting rather than a table you are obeying — when a run starts to feel optional, a streak you have kept for five straight weeks answers for you. The rest days are training too, and the non-running days are not blank: an easy bike ride, a swim or a long walk on one of them is how the classic plans fill the gap, and it costs your legs nothing. Consistency is the whole mechanism here. Nothing in twelve weeks matters more than the fact that you keep showing up.
How far does the long run go before race day?
The Saturday long run climbs from 6K in week one to 16K in week eleven — about ten miles. It grows in three phases: base at 6–8K, build at 10–13K, and peak at 14–16K, with the two tune-up races taking the long run's place in weeks six and nine.
This is your long-run ladder, and it is the heart of the plan. Think of it as three levels of earned capability rather than a spreadsheet. Base takes four weeks to make running four times a week unremarkable, and the long run only moves from 6K to 8K — two of those weeks repeat the same distance, for reasons the next section gets into. Build is where the distances start to matter — 10K, then 11K, then 13K, which is six-tenths of race distance. Peak stacks 14K and finally 16K. A beginner does not need to memorise that week ten is 14K; they need to be able to say I'm in the peak block and I've already run 14K. That is what finally gives the question am I ready? an honest answer. Run all of it slow enough to say a full sentence out loud — that is the only pace rule in the whole plan, and stopping for water does not break the run.
How do you avoid getting injured while training?
Progress by repeating distances rather than climbing every week. The strongest recent evidence — an eighteen-month study of more than 5,000 runners — found that overuse-injury risk rises sharply when a single run jumps well beyond your longest run of the previous month. A 30% spike raised the risk by 64%.
That finding is exactly why the base phase repeats 6K and then 8K instead of adding distance every weekend, and why two later weeks hold their ground rather than climbing. Sudden single-day leaps are the danger; steady work is not. The familiar rule about never adding more than 10% a week is popular but not strongly supported — a well-designed trial found no extra injury risk in new runners progressing around 24% a week over eight weeks. Injury rates among people new to running are genuinely high, so the habit worth keeping is not arithmetic on weekly totals. It is refusing to make one heroic long run far bigger than anything you have done recently. When a week feels flat, that is the plan working, not stalling.
Why does the plan stop at 16K instead of the full 21.1K?
Because you do not need to run the distance to finish it. Nearly every beginner half marathon plan peaks somewhere between 16K and 19K. The final stretch is covered by three things training cannot give you: a taper, race-day adrenaline, and a few thousand people running alongside you.
This is the question almost every first-timer asks, and it is also one of the most settled questions in the sport. In the ten to fourteen days before a half, cutting your volume lets glycogen refill, muscle damage repair, and accumulated fatigue clear — the taper does not cost you fitness, it lets the fitness you already built finally show up. Running the full 21.1K in training would add fatigue you would still be carrying on the start line, in exchange for information you do not need. The same logic scales upward: the eighteen-week marathon plan peaks at 32K for a 42.2K race, a ten-kilometre gap that nobody thinks twice about. Sixteen kilometres, run properly, is enough.
How does a fixed race date organise twelve weeks?
Register early and the date stops being negotiable. Twelve abstract weeks become a countdown with five checkpoints: registration confirmed, base phase complete, the 5K tune-up, the 10K tune-up, and the 16K long run. Each one tells you where you stand without you having to judge yourself.
This is your fixed date, and it is oddly freeing. Once the day is locked in you stop negotiating each morning about whether to run and start asking how many weeks remain until the 5K, or how close the peak long run is. The countdown carries the motivation so you do not have to manufacture it. There is a practical reason to book early too: popular halves now sell out routinely, and entry fees climb as race day approaches, so the same start line costs less the sooner you commit. Choose the race first and let the other six pieces hang off it.
Should you race a 5K and a 10K while you train?
Yes — the plan builds them in at weeks six and nine, each replacing that weekend's long run. The 5K is a check-in on your first five weeks; the 10K is a full dress rehearsal. If there is no race nearby, time yourself on your usual route. The point is one honest hard effort.
These are your moments worth capturing, and there are three of them. The week-six 5K teaches you the things a training run never will: what to eat beforehand, how not to sprint the first kilometre because everyone else did, how it feels to run in a crowd. The week-nine 10K is the rehearsal that matters — wear the exact kit you plan to race in, eat the exact breakfast, take your gels at the exact intervals, and you arrive at race day with nothing left to guess. The third is the finish-line photo. Note where the official photographers stand, tell a friend which corner to wait at, and that single image becomes the anchor of the whole story long after the soreness fades.
How many kilometres will you run in total?
About 345 kilometres — roughly 215 miles — across twelve weeks, race day included: 216K of weekday runs and around 128K of long runs and races. Put another way, you run fifteen half marathons' worth of training before you run the one that counts.
This is your running total, and watching it climb is quietly powerful in a way a training table never is. A single week looks modest — thirteen kilometres here, twenty-three there — but the number does not reset, and somewhere around week eight it stops being a plan you are following and starts being a distance you have banked. Seeing it pass 100, then 200, then 300 kilometres reframes race day entirely. By the time you line up you have already done the hard part, in small pieces, on ordinary mornings, for three months. The race is the shortest part of the whole project.
What does a first half marathon actually cost?
Budget around $300 all in. Shoes are the biggest line at $130–160 — the average running shoe now lists at about $133, with most daily trainers between $140 and $160. A mid-size half entry runs roughly $90–120 booked early, and the two tune-up races add about $55–65 between them.
This is your fund, and it deserves its own place because money quietly derails good intentions. One useful difference from marathon training: 345K sits comfortably inside a shoe's 480–800K working life, so a single pair covers the whole plan. Setting aside a small amount each week means the entry gets paid before the race sells out and the shoes get bought in week one rather than week nine. That timing matters more than it sounds — shoes bought late are shoes you race in with almost no kilometres on them. Get fitted properly at a specialty store early, run the plan in them, and by race morning they are the most rehearsed piece of kit you own. A funded plan removes one of the most common reasons a bucket-list goal quietly slides another year.
What goes on the race-week checklist?
Nothing new on race day. By week twelve everything should already be rehearsed — the shoes, the outfit, the breakfast, and the two to four gels you tested on long runs. Race week itself is three short runs, bib pickup, kit laid out the night before, and sleep.
This is your race-week checklist, the low-drama finale to twelve weeks of work — and most of it is not done in race week at all. Choosing the race, getting fitted for shoes, testing your drinks and gels on the longest runs, running once in your full race-day outfit, finding the two tune-ups: those are spread across the twelve weeks precisely so the last one is calm. On the day itself, aim for 30 to 60 grams of carbohydrate per hour and start early, within the first twenty to thirty minutes, rather than waiting until you feel empty. Most first-timers finish somewhere between 2:15 and 2:45, and anything under three hours is a genuinely good first half. If the opening kilometres feel slow enough to be wasteful, your pacing is right — the whole twelve weeks exists so there is something left for the last 5K.
When you are ready to stop reading about it and start living inside the plan, set up your first half marathon as a bucket-list goal in DreamPaths — the weekly rhythm, the long-run ladder, the race date, the two tune-ups, the kilometres, the fund and the race-week checklist, all in one calm place. The schedule tells you what to run; these seven commitments are what keep you running it.