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Half marathon plan, 12 weeks on 4 sessions — under 2 hours

12 weeks4 sessions a weekTarget 2 hours399 km of training, race day aside

A 12-week half-marathon plan on four sessions a week to break 2 hours: every pace stated, long run building to 18 km.

This plan is for you if…

  • Already running three times a week for at least six weeks, pain-free.
  • Able to run for 1 h 05 without stopping, however slowly.
  • A 10 km under 55 minutes, or a 5 km under 26:30.
  • Three to five hours a week for training, long run included.

If one of these is not true, a longer plan will take you further than a short one followed halfway.

If you have to skip a session

Ill, exhausted or in pain, do not run: a plan absorbs a missed session, it does not absorb an injury. Drop the easy run first — it is the least specific. If it is the quality session or the long run that goes, do not move it to another day of the same week; pick the next week up where the plan is, never where you stopped.

Your paces for 2 hours

Pacemin/kmWhat it feels like
Easy6:47 – 7:18The pace most of this plan is run at. If you cannot hold a conversation, it is too fast.
Long run6:54In the firm third of the easy band, never outside it. However long it is, a long run is never run quicker than this.
Half-marathon pace5:36Half-marathon pace: race day if that is your distance, otherwise the marker just above race-day pace.
Threshold pace5:24The pace you could hold for about an hour in a race.
5 km pace5:085 km race pace: strong, never maximal.

All 12 weeks, session by session

The long run is 45 % of the heaviest week, against 30 to 35 % in a plan built on five or six runs. On few sessions that is arithmetic: what protects you is not the share but the duration, and no long run in this plan reaches three hours.

Week 1

Base31 km

Set the rhythm: nothing hard, since the aerobic base comes before any speed is added. One easy run closes with strides — 20 s quick and relaxed, 40 s of jogging, no watch and no target pace.

  1. 1

    Easy run40 min

    Conversational pace: you should be able to talk.

  2. 2

    Easy run49 min

    Conversational pace: you should be able to talk. Finish with 4 strides.

  3. 3

    Easy run45 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run11 km

    11 comfortable km from start to finish. If it feels hard, it is too fast.

Week 2

Base33 km

Bring in threshold, the pace a half marathon is decided at. Twenty continuous minutes, no more.

  1. 1

    Easy run40 min

    Conversational pace: you should be able to talk.

  2. 2

    Threshold50 min

    20 continuous minutes at Threshold pace.

  3. 3

    Easy run45 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run13 km

    13 comfortable km from start to finish. If it feels hard, it is too fast.

Week 3

Base38 km

First full week: aerobic power, easy running around it, and a long run that starts growing.

  1. 1

    Easy run45 min

    Conversational pace: you should be able to talk.

  2. 2

    Aerobic power67 min

    6 × 800 m at 5 km pace, 2 min recovery.

  3. 3

    Easy run45 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run14 km

    14 comfortable km from start to finish. If it feels hard, it is too fast.

Week 4

Base28 km

A lighter week. Progress is built on the days you run less.

  1. 1

    Easy run35 min

    Conversational pace: you should be able to talk.

  2. 2

    Half-marathon pace42 min

    12 continuous minutes at Half-marathon pace.

  3. 3

    Easy run40 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run11 km

    11 comfortable km from start to finish. If it feels hard, it is too fast.

Week 5

Build39 km

Repetitions stretch to 1,000 m at 5 km pace — strong, never all-out — and the long run finishes at race-day pace.

  1. 1

    Easy run45 min

    Conversational pace: you should be able to talk.

  2. 2

    Aerobic power68 min

    5 × 1000 m at 5 km pace, 150 s recovery.

  3. 3

    Easy run45 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run15 km

    15 km, the last 4 at Half-marathon pace.

Week 6

Build40 km

The block's peak, and the volume shows it: one hard session only, two blocks at goal pace, 17 km in the long run and easy running for the rest.

  1. 1

    Easy run50 min

    Conversational pace: you should be able to talk.

  2. 2

    Half-marathon pace56 min

    2 × 10 minutes at Half-marathon pace, 3 min recovery.

  3. 3

    Easy run50 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run17 km

    17 km, the last 5 at Half-marathon pace.

Week 7

Build33 km

A down week before the specific block: the fast work stays, shorter, and the volume comes down.

  1. 1

    Easy run40 min

    Conversational pace: you should be able to talk.

  2. 2

    Aerobic power54 min

    4 × 800 m at 5 km pace, 2 min recovery.

  3. 3

    Easy run40 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run13 km

    13 comfortable km from start to finish. If it feels hard, it is too fast.

Week 8

Specific40 km

Specific block: no more short repetitions. Threshold, in two fifteen-minute blocks, prepares half-marathon pace.

  1. 1

    Easy run45 min

    Conversational pace: you should be able to talk.

  2. 2

    Threshold blocks68 min

    2 × 15 minutes at Threshold pace, 4 min recovery.

  3. 3

    Easy run40 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run17 km

    17 km, the last 6 at Half-marathon pace.

Week 9

Specific42 km

The peak, and it is specific: 3 × 2 km at goal pace, then eighteen kilometres with six at that same pace. Threshold has done its work.

  1. 1

    Easy run45 min

    Conversational pace: you should be able to talk.

  2. 2

    Half-marathon pace73 min

    3 × 2 km at Half-marathon pace, 3 min recovery.

  3. 3

    Easy run40 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run18 km

    18 km, the last 6 at Half-marathon pace.

Week 10

Specific35 km

Last week of load, already smaller. Threshold goes, goal pace stays: twenty minutes, then 16 km with four at that pace.

  1. 1

    Easy run40 min

    Conversational pace: you should be able to talk.

  2. 2

    Half-marathon pace50 min

    20 continuous minutes at Half-marathon pace.

  3. 3

    Easy run40 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run16 km

    16 km, the last 4 at Half-marathon pace.

Week 11

Taper26 km

Taper. Fifteen minutes at goal pace to keep it in the legs, and nothing more.

  1. 1

    Easy run30 min

    Conversational pace: you should be able to talk.

  2. 2

    Half-marathon pace45 min

    15 continuous minutes at Half-marathon pace.

  3. 3

    Easy run30 min

    Conversational pace: you should be able to talk.

  4. 4

    Long run10 km

    10 comfortable km from start to finish. If it feels hard, it is too fast.

Week 12

Race14 km

Race week. You maintain; you no longer build.

  1. 1

    Easy run30 min

    Conversational pace: you should be able to talk.

  2. 2

    Half-marathon pace45 min

    3 × 3 minutes at Half-marathon pace, 2 min recovery.

  3. 3

    Easy run20 min

    Conversational pace: you should be able to talk.

  4. 4

    Half marathon21.0975 km

    Race day.

Put this plan in your calendar

Stibia exports this plan to your watch, on the days you run, with your long session on the day you choose, and the plan ending on your race date.

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This plan is general training material and does not replace medical advice. If it hurts, stop and see someone.