Beginner Marathon Training Plan: Free 20 Week Plan
Free beginner marathon plan
20 week beginner marathon training plan
This is a simple static plan for first time marathoners who want a clear schedule and do not want to build one from scratch. It uses four run days, two rest days, one cross training or strength day, and a gradual long run build toward race day. It is best if you already have a small running base.
Who this beginner marathon plan is for
This plan is best for a first marathon if you already run a few times per week and can finish about 3 to 4 miles at an easy pace. It is not a couch to marathon plan. If you are starting from zero, start with a 5K training plan, then build toward a 10K or half marathon before taking on a marathon.
Good fit
- You want to finish your first marathon.
- You can run easy several days per week.
- You prefer a simple plan over pace charts.
Use the custom plan instead
- Your race is not 20 weeks away.
- You have a goal time.
- You need different long run days or fewer run days.
Back up first
- You cannot run 3 miles yet.
- You are dealing with a pain that changes your stride.
- You have missed several weeks of running already.
How the week works
The plan uses the same simple rhythm every week. That makes it easier to follow when life is busy.
Default week
- Monday: Rest.
- Tuesday: Easy run.
- Wednesday: Cross training or short strength session.
- Thursday: Easy run.
- Friday: Rest.
- Saturday: Short easy run.
- Sunday: Long run.
Effort guide
Most runs should feel easy enough that you could talk without gasping. Save your energy for the long run and for showing up again next week.
If you use heart rate or pace, keep the easy runs controlled. Our heart rate zones vs pace zones guide can help you choose a simple way to judge effort.
20 week beginner marathon training plan
All distances are in miles, with the long run also shown in kilometres. Move the days around if needed, but try to keep a rest day before or after the long run.
| Week | Tuesday | Thursday | Saturday | Sunday long run | Total | Focus |
|---|---|---|---|---|---|---|
| 1 | 3 mi easy | 3 mi easy | 3 mi easy | 6 mi / 10 km | 15 mi | Start easy. Keep every run conversational. |
| 2 | 3 mi easy | 3 mi easy | 3 mi easy | 7 mi / 11 km | 16 mi | Same rhythm, slightly longer long run. |
| 3 | 3 mi easy | 4 mi easy | 3 mi easy | 8 mi / 13 km | 18 mi | Add a little volume, not speed. |
| 4 | 3 mi easy | 3 mi easy | 3 mi easy | 6 mi / 10 km | 15 mi | Cutback week. Let your legs catch up. |
| 5 | 4 mi easy | 4 mi easy | 3 mi easy | 9 mi / 14 km | 20 mi | Settle into the routine. |
| 6 | 4 mi easy | 4 mi easy | 4 mi easy | 10 mi / 16 km | 22 mi | First double digit long run. |
| 7 | 4 mi easy | 5 mi easy | 4 mi easy | 11 mi / 18 km | 24 mi | Keep the long run slow. |
| 8 | 3 mi easy | 4 mi easy | 3 mi easy | 8 mi / 13 km | 18 mi | Cutback week. This is part of the plan. |
| 9 | 4 mi easy | 5 mi easy | 4 mi easy | 12 mi / 19 km | 25 mi | Practise taking water on the long run. |
| 10 | 5 mi easy | 5 mi easy | 4 mi easy | 13 mi / 21 km | 27 mi | This is about time on feet. |
| 11 | 5 mi easy | 6 mi easy | 4 mi easy | 14 mi / 23 km | 29 mi | Test race day fuel in small amounts. |
| 12 | 4 mi easy | 5 mi easy | 4 mi easy | 10 mi / 16 km | 23 mi | Cutback week. Do not make it harder. |
| 13 | 5 mi easy | 6 mi easy | 5 mi easy | 15 mi / 24 km | 31 mi | Long runs now need planning. |
| 14 | 5 mi easy | 7 mi easy | 5 mi easy | 16 mi / 26 km | 33 mi | Keep easy days truly easy. |
| 15 | 5 mi easy | 8 mi easy | 5 mi easy | 18 mi / 29 km | 36 mi | Practise shoes, socks, fuel, and breakfast. |
| 16 | 4 mi easy | 6 mi easy | 4 mi easy | 13 mi / 21 km | 27 mi | Cutback week before the peak long run. |
| 17 | 5 mi easy | 8 mi easy | 5 mi easy | 20 mi / 32 km | 38 mi | Peak week. Slow and controlled is the win. |
| 18 | 4 mi easy | 6 mi easy | 4 mi easy | 12 mi / 19 km | 26 mi | Taper starts. Less running is the point. |
| 19 | 3 mi easy | 4 mi easy | 3 mi easy | 8 mi / 13 km | 18 mi | Stay loose. Do not chase fitness now. |
| 20 | 3 mi easy | 2 mi easy | Rest easy | Race day 26.2 mi / 42.2 km | 31.2 mi | Race week. Keep calm and start slower than you want. |
Long run progression
The long run is the key workout in this plan. It builds time on feet and gives you a safe place to practise shoes, socks, breakfast, hydration, and fuel.
Do not race the long runs. For most first marathoners, the win is finishing the run under control and being able to recover for the next week.
Cross training and strength notes
Use Wednesday for easy cross training, light strength, or mobility. Keep it helpful, not exhausting.
Good options
Cycling, swimming, elliptical, brisk walking, yoga, or an easy hike can work well if they do not leave your legs heavy.
Strength focus
Keep it short. Think calves, glutes, hips, hamstrings, and core. Use our strength training for runners guide if you want a simple routine.
Peak weeks
During weeks 13 to 17, reduce hard strength work. You should not feel like you are recovering from leg day during your long run.
Rest days are part of the plan
Monday and Friday are rest days because marathon training works best when your body can absorb the work. Rest does not mean you are falling behind. It is the reason the next run can go well.
- Keep Monday quiet after the long run.
- Keep Friday easy so Saturday and Sunday do not stack too much fatigue.
- Walk, stretch lightly, or do normal life activity if that feels good.
- Take an extra rest day if soreness turns into sharp pain or changes how you run.
For more detail, use the recovery days for runners guide.
What to do if you miss a week
You do not need to quit the plan if a cold, family week, work trip, or sore leg interrupts training. The big mistake is trying to cram missed runs into the next few days.
If you miss 1 or 2 runs
Skip them and continue with the next planned run. Do not double up. If the missed run was the long run, keep the next long run shorter if needed.
If you miss a full week
Repeat the week you missed, then continue. If your race date does not allow that, cut the next long run by 20 to 30 percent and rebuild from there.
If you miss two weeks
Use the custom training plan creator or adjust your goal. It is better to arrive undertrained but healthy than tired and hurt.
If your longest run gets skipped
Do not replace it with a 20 mile run in the final two weeks. Stay with the taper and protect race day.
Fuel, gear, and race practice
By week 9, start treating long runs like practice for race day. Use the same shoes, socks, breakfast, and fuel you may use during the marathon.
Fuel practice
For long runs over about 90 minutes, practise the food and fluids you may use on race day. Start small and use what your stomach handles well.
Shoe check
If your shoes are tired or not working, use the running shoe finder before peak weeks. Do not save brand new shoes for race day.
Watch check
A GPS watch can help with long run distance and pacing. Use the running watch finder if you need one for marathon training.
Have a race date or goal time?
This page is the simple version. Use it if you want one clear 20 week plan. If your race is sooner, later, hilly, or tied to a goal time, build a custom plan instead.
Printable version
Use the button below to print the plan or save it as a PDF from your browser. You can also download a simple HTML copy and keep it on your computer or phone.
Beginner marathon plan FAQ
Is 20 weeks enough for a first marathon?
It can be enough if you already have a small running base. This plan assumes you can run about 3 to 4 miles and train four days per week. If that feels too aggressive, spend more time building your base first.
Can I move the long run to Saturday?
Yes. Move the Saturday easy run to Sunday or skip it. Keep Friday as a rest day when possible.
Should I run the full marathon distance in training?
No. For this beginner plan, the longest training run is 20 miles. The full 26.2 miles happens on race day.
What pace should I use?
Run most days at an easy conversational effort. If you have a specific finish time, use the custom plan creator so the schedule can match your goal.
