Sub-2 hour half marathon
Run 21.1 km in under 2 hours — 12 weeks, 5 running days a week.
12 weeksThe most popular time goal in amateur running, and a fair one: sub-2 is achievable for most people who run consistently for a season. Twelve weeks, five days a week. The decisive session is not the intervals — it is the long run with goal-pace kilometres inside it, which teaches the specific thing the race asks for: holding 5:37/km on legs that are already tired.
Before you start: A completed half marathon in roughly 2:05–2:20, or a 10K under about 55 minutes.
The pace this goal requires
2:00:00 over 21.0975 km is 5:41 per kilometre. Train and plan for 5:37 — a four-second margin per kilometre absorbs one bad kilometre, one water station and one bunched start, which is exactly what goes wrong on the day. Full kilometre-by-kilometre splits for this target are on the split calculator.
The full 12-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 | Rest | 5 × 1 km at 5:20/km, 90 s jog | Easy 6 km | 20 min threshold at 5:30/km | Rest | Easy 6 km | Long run 12 km, easy | 12 km |
| 2 | Rest | 6 × 1 km at 5:20/km, 90 s jog | Easy 6 km | 25 min threshold at 5:30/km | Rest | Easy 6 km | Long run 14 km, easy | 14 km |
| 3 Long run: last 4 km at 5:37/km |
Rest | 3 × 2 km at 5:30/km, 2 min jog | Easy 7 km | 30 min threshold | Rest | Easy 7 km | Long run 15 km, easy | 15 km |
| 4 Cutback week |
Rest | 8 × 600 m at 5:10/km, 90 s jog | Easy 6 km | 20 min threshold | Rest | Easy 6 km | Long run 12 km, easy | 12 km |
| 5 Long run: last 5 km at 5:37/km |
Rest | 4 × 2 km at 5:30/km, 2 min jog | Easy 7 km | 35 min threshold at 5:30/km | Rest | Easy 7 km | Long run 16 km, easy | 16 km |
| 6 | Rest | 10 × 400 m at 5:00/km, 75 s jog | Easy 7 km | 2 × 20 min at 5:30/km | Rest | Easy 7 km | Long run 18 km, easy | 18 km |
| 7 Cutback week |
Rest | 5 × 1 km at 5:15/km | Easy 6 km | 25 min threshold | Rest | Easy 6 km | Long run 14 km, easy | 14 km |
| 8 Long run: last 6 km at 5:37/km |
Rest | 3 × 3 km at 5:37/km, 3 min jog | Easy 8 km | 40 min steady at 5:50/km | Rest | Easy 8 km | Long run 19 km, easy | 19 km |
| 9 Longest run of the plan |
Rest | 6 × 1 km at 5:15/km, 90 s jog | Easy 8 km | 45 min steady at 5:50/km | Rest | Easy 8 km | Long run 20 km, easy | 20 km |
| 10 Taper begins |
Rest | 2 × 4 km at 5:37/km, 3 min jog | Easy 7 km | 30 min threshold | Rest | Easy 7 km | Long run 16 km, easy | 16 km |
| 11 | Rest | 5 × 1 km at 5:20/km | Easy 5 km | 20 min at 5:37/km | Rest | Easy 5 km | Long run 12 km, easy | 12 km |
| 12 Goal week |
Rest | 3 km at 5:37/km | Easy 4 km | 20 min easy with 4 × 20 s strides | Rest | Easy 4 km | Race: half marathon | Race: half marathon |
How to run this plan
- Goal-pace running inside the long run is the highest-value session in this plan. Never skip it.
- Easy pace should be around 6:40–7:10/km. Running easy days at 6:00 is the classic reason a sub-2 attempt stalls.
- Rehearse fuelling: something at around 60 and 90 minutes, drunk or eaten while moving.
- Three weeks of taper at the end. Volume drops; intensity is kept, briefly.
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 two to 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-2 hour half marathon plan?
12 weeks, running 5 days a week. A completed half marathon in roughly 2:05–2:20, or a 10K under about 55 minutes.
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 21.1 km in under 2 hours realistic for me?
A completed half marathon in roughly 2:05–2:20, or a 10K under about 55 minutes. If you are some way off that, the honest answer is that this plan will not bridge the gap in 12 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 half 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.