Sub-3:30 marathon
Run 42.2 km in under 3 hours 30 minutes — 16 weeks, 6 running days a week.
16 weeksSixteen weeks, six days a week, peaking around 85 km. This is the point where the marathon stops responding to willpower and starts responding to weekly volume. Two quality sessions, a long run with substantial marathon-pace work, and four genuinely easy runs to carry the load in between.
Before you start: A marathon around 3:35–3:55, or a half marathon under about 1:38, and a year of 50 km weeks behind you.
The pace this goal requires
3:30:00 over 42.195 km is 4:58 per kilometre — the same pace as a sub-1:45 half marathon, sustained for twice the distance. If a 1:45 half is at your limit rather than comfortably inside it, spend a season on the half before attempting this. Full kilometre-by-kilometre splits for this target are on the split calculator.
The full 16-week schedule
Every session written out. Print this page — the navigation, banners and footer are all stripped from the printed version, leaving the table.
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun | Long run |
|---|---|---|---|---|---|---|---|---|
| 1 | Easy 9 km | 6 × 1 km at 4:35/km, 90 s jog | Easy 9 km | 30 min threshold at 4:45/km | Rest | Easy 9 km | Long run 22 km, easy | 22 km |
| 2 Long run: last 5 km at 4:55/km |
Easy 9 km | 5 × 1.6 km at 4:40/km, 2 min jog | Easy 9 km | 35 min threshold | Rest | Easy 9 km | Long run 24 km, easy | 24 km |
| 3 | Easy 10 km | 3 × 3 km at 4:50/km, 3 min jog | Easy 10 km | 40 min threshold at 4:50/km | Rest | Easy 10 km | Long run 26 km, easy | 26 km |
| 4 Cutback week |
Easy 9 km | 8 × 800 m at 4:30/km, 90 s jog | Easy 9 km | 30 min threshold | Rest | Easy 9 km | Long run 20 km, easy | 20 km |
| 5 Long run: last 10 km at 4:55/km |
Easy 10 km | 2 × 20 min at 4:50/km | Easy 10 km | 45 min steady at 5:20/km | Rest | Easy 10 km | Long run 28 km, easy | 28 km |
| 6 | Easy 10 km | 6 × 1.6 km at 4:35/km, 2 min jog | Easy 10 km | 50 min steady | Rest | Easy 10 km | Long run 30 km, easy | 30 km |
| 7 Cutback week |
Easy 9 km | 35 min threshold at 4:50/km | Easy 9 km | 45 min steady | Rest | Easy 9 km | Long run 24 km, easy | 24 km |
| 8 Long run: last 12 km at 4:55/km |
Easy 11 km | 4 × 3 km at 4:50/km, 3 min jog | Easy 11 km | 60 min steady | Rest | Easy 11 km | Long run 32 km, easy | 32 km |
| 9 | Easy 11 km | 2 × 25 min at 4:50/km | Easy 11 km | 60 min steady | Rest | Easy 11 km | Long run 32 km, easy | 32 km |
| 10 Cutback week |
Easy 9 km | 30 min threshold | Easy 9 km | 50 min steady | Rest | Easy 9 km | Long run 24 km, easy | 24 km |
| 11 Long run: 15 km at 4:55/km in the middle |
Easy 11 km | 8 × 1 km at 4:30/km, 90 s jog | Easy 11 km | 65 min steady | Rest | Easy 11 km | Long run 34 km, easy | 34 km |
| 12 | Easy 11 km | 3 × 5 km at 4:55/km, 3 min jog | Easy 11 km | 60 min steady | Rest | Easy 11 km | Long run 30 km, easy | 30 km |
| 13 Longest run: last 18 km at 4:55/km |
Easy 10 km | 2 × 25 min at 4:50/km | Easy 10 km | 55 min steady | Rest | Easy 10 km | Long run 35 km, easy | 35 km |
| 14 Taper begins |
Easy 9 km | 30 min at 4:55/km | Easy 9 km | 45 min steady | Rest | Easy 9 km | Long run 24 km, easy | 24 km |
| 15 | Easy 7 km | 20 min at 4:55/km | Easy 7 km | 35 min easy | Rest | Easy 7 km | Long run 16 km, easy | 16 km |
| 16 Goal week |
Easy 5 km | 3 km at 4:55/km | Easy 5 km | 20 min easy with 4 × 20 s strides | Rest | Easy 5 km | Race: marathon | Race: marathon |
How to run this plan
- Six days a week means five of them must be easy or the plan collapses in week nine. Easy is 5:50–6:20/km here.
- The mid-week medium-long run is what separates this plan from the sub-4 one. Do not trim it when the week gets busy.
- Carbohydrate intake of 60–90 g per hour, practised in training until your gut tolerates it.
- Take the cutback weeks fully. At 80 km a week, the adaptation happens in the down weeks, not the up ones.
Strength work. Strength: 20 min of squats, lunges, single-leg calf raises, glute bridges and planks. This is the injury insurance. Add it on an easy day or straight after an easy run — never the day before a quality session.
The principle underneath the table
Roughly eighty per cent of the running in this plan is easy, and that ratio is not a compromise — it is the mechanism. Easy running builds the aerobic machinery that lets you absorb the hard sessions; hard running that is not paid for by easy running just accumulates fatigue. The most common way an amateur plan fails is that the easy days creep up to a moderate pace, the hard days consequently drift down to the same moderate pace, and the runner spends twelve weeks training one gear.
The second principle is the cutback week. Volume in this plan does not climb monotonically; every third or fourth week it drops. Adaptation happens during recovery, not during the session, and a plan without down weeks is a plan that banks fatigue until something gives.
The third is the taper. The last three weeks reduce volume sharply while keeping a small amount of intensity. It will feel wrong. Do it anyway — nothing you run in the final fortnight can make you fitter, and plenty of it can make you tired.
Questions
How long is the sub-3:30 marathon plan?
16 weeks, running 6 days a week. A marathon around 3:35–3:55, or a half marathon under about 1:38, and a year of 50 km weeks behind you.
What if I miss a week?
One missed week: pick the plan up where you left off, do not try to catch up by doubling anything. Two or more: step back two weeks in the schedule and rebuild. The plan is a progression, and the progression is the part that works — skipping forward to stay 'on schedule' is how people get injured in week ten.
Can I move the days around?
Yes, with one rule: keep at least one easy or rest day between the quality sessions and the long run. The days of the week are arbitrary; the spacing is not.
Is run 42.2 km in under 3 hours 30 minutes realistic for me?
A marathon around 3:35–3:55, or a half marathon under about 1:38, and a year of 50 km weeks behind you. If you are some way off that, the honest answer is that this plan will not bridge the gap in 16 weeks — build the base first and come back. Put a recent race into the race time predictor to see where you actually stand.
How do I train for this in Indian heat?
Move everything to before sunrise, run the quality sessions by effort rather than pace once it is above about 25°C, and accept that summer paces are slower than winter paces at identical fitness. In the north from November to January, check air quality before every session and take it indoors when readings are bad.
Other marathon plans
All twelve are listed on the training plans page.
Every time, pace and physiological figure on this site is computed from a published formula, and the formula is named and shown on the method page. Nothing here is predicted by a model you cannot check. Race details change — always confirm dates, routes and entry with the official organiser. Training guidance is general information, not individual coaching or medical advice.