3 runs a week · 18 weeks
3-day-a-week marathon training plan
Short on time or prone to injury? You can train for a marathon on three runs a week. Each run has a clear job: a quality session, an easy run and the long run.
This sample starts at 15 miles a week. Because there are fewer runs, each one carries more of the mileage: the long run grows from 6 to 20 miles and the week peaks at 39.5 miles, with recovery weeks built in.
The plan
3-day-a-week marathon plan: week by week
Intermediate runner, 3 runs a week, starting from 15 miles a week. 18 weeks to race day.
- 18
- weeks
- 39.5
- mi peak week
- 20
- mi longest run
- 446
- mi in total
Weekly distance
Training efforts
- RecoveryRecovery runsRPE 2 · very easy, slower than you think
- EasyEasy and long runsRPE 3 to 4 · conversational
- SteadySteady runsRPE 5 · steady, can speak in short sentences
- Race paceRace-pace workGoal race effort
- ThresholdTempo, cruise repsRPE 7 · comfortably hard, about one-hour race effort
- Interval800 m intervalsRPE 8 to 9 · hard, about 5K race effort
Add a recent race or goal time in the builder for exact paces.
| Week | Phase | Distance | Long run | Key sessions |
|---|---|---|---|---|
| 1 | Base | 15 mi | 6 mi | Steady run 3 mi |
| 2 | Base | 16.5 mi | 7 mi | Steady run 3 mi |
| 3 | Base | 18 mi | 8.5 mi | Steady run 3 mi |
| 4 | Baserecovery | 13.5 mi | 5.5 mi | Steady run 3 mi |
| 5 | Base | 19.5 mi | 9.5 mi | Steady run 3 mi |
| 6 | Build | 21 mi | 11 mi | Intervals 3 mi |
| 7 | Build | 23 mi | 12 mi | Intervals 3 mi |
| 8 | Buildrecovery | 17 mi | 8 mi | Intervals 3 mi |
| 9 | Build | 25 mi | 13.5 mi | Intervals 3.5 mi |
| 10 | Build | 27.5 mi | 14.5 mi | Intervals 4 mi |
| 11 | Build | 30 mi | 16 mi | Intervals 4.5 mi |
| 12 | Buildrecovery | 22.5 mi | 11 mi | Intervals 3 mi |
| 13 | Peak | 33 mi | 17 mi | Marathon-pace run 5.5 mi |
| 14 | Peak | 36 mi | 18.5 mi | Marathon-pace run 6 mi |
| 15 | Peak | 39.5 mi | 20 mi | Marathon-pace run 6.5 mi |
| 16 | Taper | 29.5 mi | 13 mi | Short tempo 5 mi |
| 17 | Taper | 21.5 mi | 9 mi | Short tempo 3.5 mi |
| 18 | Race week | 38 mi | 26.2 mi | Race week: easy runs, then race day |
Sample week
3-day-a-week marathon plan: a peak week, day by day
Week 15 of 18, 39.5 miles. Every run in your own plan comes with its distance, structure and target pace.
Week 15 of 18
Peak- MonRest
- TueEasy runRPE 3 to 4 · conversational13mi
- WedRest
- ThuMarathon-pace runGoal race effort6.5mi
- FriRest
- SatRest
- SunLong run, fast finishRPE 3 to 4 · conversational20mi
Who this plan is for
- You can only run three days a week, or you recover slowly.
- You like to cross-train on the other days.
- Your marathon is four months or more away.
How to adjust it
- Add cycling or swimming on non-running days for extra fitness.
- Pick the day with the most time for the long run.
- If a fourth run fits later, switch to four days and the plan rebalances.
Why this 3-day-a-week marathon plan works
Make every run count
With three runs a week, there are no junk miles. Each session has a clear purpose.
Cross-train if you like
Cycling or swimming on non-running days adds aerobic fitness without the impact.
Long run on your freest day
Pick the day you have the most time and energy. The plan arranges the week around it.
3-day-a-week marathon plan FAQ
Can you run a marathon training three days a week?
Yes. Many runners finish marathons on three runs a week, especially with cross-training on other days.
Which three days should I run?
Spread them out, for example Tuesday, Thursday and Sunday, so you always have a recovery day between runs.
Is 3 days a week enough for a good marathon time?
It's enough to finish well. For an ambitious time goal, four or five runs a week gives you more room to build.
How long are the long runs?
This sample builds to 20 miles. With fewer runs, the long run is a bigger share of each week.
Does cross-training count?
It builds aerobic fitness without impact. It doesn't replace running, but it helps, especially for injury-prone runners.
What's free and what's paid
Free: the plan outline (phases, weekly mileage and paces) plus the first 2 weeks day by day. Every session, the PDF and calendar sync come with Monthly ($13/month, cancel anytime), Yearly ($70/year) or Lifetime ($100 once, a one-time payment).
Related training plans
See every option on the marathon training plan page.