Training plans Half marathon
The sub-2:05 half marathon
A sub-2:05 half marathon works out at 5:55/km (9:32/mi), held for the full distance. Typical preparation is 10–14 weeks of 41–58km a week, spread over 4–5 sessions. The work splits into three paces: easy volume at 6:50–7:25/km, threshold running near 5:41/km, and interval reps around 5:26/km. A recent race time is the truest guide to whether this goal fits this season.
Last updated 2026-07-03 · paces computed, not copywritten
Goal pace
5:55/km
9:32/mi
Typical build
10–14 weeks
41–58 km/week
Runs per week
4–5
3 key sessions + easy volume
Required paces
| SESSION | PACE (/KM) |
|---|---|
| Easy runs | 6:50–7:25 |
| Long run | 6:20–6:50 |
| Tempo | 5:41 |
| Intervals | 5:26 |
| Race pace | 5:55 |
Splits at goal pace
| CHECKPOINT | CLOCK |
|---|---|
| 5K | 29:37 |
| 10K | 59:15 |
| 15K | 1:28:52 |
| Finish | 2:05:00 |
These are dead-even splits — going out quicker than 5:55/km is the most common way a 2:05 slips away in the final quarter.
A typical week
Key session 1
Intervals — reps around 5:26/km (5K effort) with jog recoveries
Key session 2
Tempo — sustained comfortably-hard running near 5:41/km
Long run
The week's cornerstone at 6:20–6:50/km, adding 2:05-pace finishes as race day nears
Plus 2+ easy runs. The remaining runs stay genuinely easy (6:50–7:25/km); they carry the volume the key sessions are built on.
Asked often
- What pace is a sub-2:05 half marathon?
- 5:55 per kilometre, held for the full half marathon. Even or slightly negative splits protect a 2:05 far better than a fast start.
- How long should I train for a sub-2:05 half marathon?
- From a reasonable base, 10–14 weeks. Start from where your running actually is: a recent race time sets the half marathon timeline better than the calendar does.
- What happens if I miss training weeks?
- A static plan quietly breaks — every later week assumes fitness you didn't build. An adaptive plan like RunV's re-ramps volume and recalibrates paces so the 2:05 goal stays honest.
This fitness at other distances
- Marathon: 4:20:37 equivalent
- 10K: 56:39 equivalent
- 5K: 27:10 equivalent
The engine behind your sub-2:05
RunV builds your sub-2:05 plan around your week, then recalibrates it after every run — finished, cut short, or missed.
