How can I run a marathon? A first marathon guide
How can I run a marathon? Pick a race 16 to 20 weeks away, run three or four days a week, grow one weekly long run to 18 to 20 miles, then taper and fuel. This page gives the steps, the weeks for each starting point and what a first-marathon week looks like. The generator builds the plan around your days.
How to train for a marathon as a beginner: six steps
- Choose a race 16 to 20 weeks away. Fewer weeks only if you already run 20 miles a week.
- Run three or four days a week, every week. Consistency matters more than any single run; the plan adds the miles.
- Make one run the long run. It grows a little each week, with an easier week every fourth, until it reaches 18 to 20 miles three weeks before the race.
- Keep everything easy. Conversational pace on every run. The generator gives first-timers no tempo work, and that is the right call.
- Taper for three weeks. Cut volume, keep a few short pickups, arrive fresh.
- Practice fueling on long runs. Gels, drinks and breakfast are rehearsed in training, never tried on race day.
The generator below applies those six steps to your race date, your run days and your longest recent run.
Build your free marathon plan
Same engine as every plan on this site, but with your race date, your run days and your longest recent run. Prints to PDF, exports to your calendar. No signup.
How many weeks to train for a marathon for beginners
The honest answer depends on what you run now. A beginner who already jogs three times a week needs 16 weeks; a beginner who has not run since school needs 20 to 24, and the first weeks are walks and short runs.
| Where you start | Weeks | Plan |
|---|---|---|
| Little or no running | 20 to 24 | Couch to marathon, 20 weeks |
| 2 to 3 runs a week, longest run about 5 miles | 18 to 20 | 20-week marathon plan |
| 3 to 4 runs a week, about 20 miles | 16 | Beginner marathon plan, 16 weeks |
The reasoning behind each range is in how long to train for a marathon.
What a first marathon plan looks like
Four phases: base, build, peak, taper. Base is easy running while the long run creeps up. Build raises weekly volume. Peak holds the longest runs and the highest mileage of the plan. Taper, the last three weeks, lets the work sink in.
Enter 25 miles a week and a 10-mile longest run and the 16-week beginner plan peaks at 35 miles in week 13 with the long run at its 20-mile cap, then steps down for three weeks. Every session is an easy run or a long run; there is no speed work in a first-marathon plan because the long run does the teaching. When you enter a goal time, the plan sets the long-run pace 60 seconds per mile slower than race pace and easy runs 75 seconds slower.
The plan does not adjust itself after a missed week. Skip one, and the safe move is to regenerate from today's date rather than cram the missed miles into the next week.
How can I run a marathon well? Pick and prepare for the race
Choose the race for the course, not the medal. Flat, a cool month, a big field with pace groups and a time limit of six hours or more make a first marathon kinder. Most road marathons start early in the morning, often between 6 and 8 a.m., so do a few long runs at that hour and eat the breakfast you plan to eat on the day.
In the last three weeks the taper does the work, and on the day the race day guide covers the timeline and the checklist. Your goal pace, if you set one, is on the marathon pace chart; for a first marathon, an easy, even pace from the first mile is the plan.
Frequently asked questions
How do I train for a marathon as a beginner?
Run three or four days a week for 16 to 20 weeks, grow one long run to 18 to 20 miles, keep every run easy, and taper for three weeks. The generator builds that schedule around your run days.
What time do marathons start?
Most road marathons start in the early morning, commonly between 6 and 8 a.m., to beat the heat and close the roads early. Check your race's start time and practice eating and running at that hour.
How do I prepare for my first marathon in the last week?
Run short and easy, sleep well two nights before, eat carbs for two or three days, lay out your gear the night before and run the first mile slower than you think you should.
How do I run a marathon without stopping?
Train the long run to 18 to 20 miles at an easy pace and race at that same effort. Walking through aid stations is allowed and often faster overall than drinking on the run.
What is a good first marathon?
A flat course in a cool month, a large field with pace groups, a generous time limit and a start you can reach without a long drive at 5 a.m.