What pace do you need?
A sub-2:00 half marathon requires an average pace of 5:41 min/km (9:09 min/mi). That includes the time you spend at water stations, on hills, and in the final kilometre when your legs are at their worst.
In practice, you need to be comfortable running at 5:30–5:35 min/km during training tempo sessions to have a buffer on race day. Running exactly at goal pace in training is not enough — race day conditions (weather, course, adrenaline management) will vary.
Are you ready to attempt sub-2?
The best predictor is your current 5 km time. If you can run 5 km in under 27:00, a sub-2:00 half is within reach with a 10–12 week structured plan. Under 25:30 and you likely have the aerobic base already — the limiting factor becomes race execution.
If your 5 km is 27–30 minutes, build your base for 4–6 weeks first before starting a plan aimed at sub-2:00. Jumping straight into speed work without the aerobic foundation leads to injury and diminishing returns from the quality sessions.
- →5 km under 25:30 → sub-2 is very likely with consistent training
- →5 km 25:30–27:00 → achievable with a focused 12-week plan
- →5 km 27:00–30:00 → possible, but build base first
- →5 km over 30:00 → aim for sub-2:15 as an intermediate target
The three workouts that matter most
Tempo runs at 5:15–5:25 min/km teach your body to sustain race-adjacent effort. A typical tempo session for this goal: 2 km easy warm-up, 5–7 km at tempo pace, 1 km easy cool-down. Do this once per week through the strength and speed phases.
Race-pace intervals build the ability to hold goal pace when fatigue sets in. A classic session: 4–6 × 1 km at 5:30–5:35 min/km with 90 seconds recovery. These are harder to execute than they sound — most runners go out too fast on the first rep.
The long run is the foundation. For sub-2:00, your peak long run should reach 18–21 km. The pace should be easy (6:30–7:00 min/km) — the goal is time on your feet, not speed. Runners who turn every long run into a time trial are the ones who arrive at race day with tired legs.
How long will training take?
For a runner with a 5 km base in the 25–27 minute range, a 12-week plan is sufficient. The first four weeks build aerobic base, weeks 5–9 introduce tempo and interval work, and weeks 10–12 taper.
Don't compress the plan to fewer than 10 weeks. The physiological adaptations from tempo and interval work — particularly the improvement in lactate threshold — take 3–6 weeks to fully express. Starting a hard speed block four weeks out from a race gives you half the benefit.
Sample training week (strength phase)
This is an example of what a mid-plan week looks like for a runner targeting sub-2:00, running four days per week:
- →Monday: Rest or 20-minute easy walk
- →Tuesday: Easy run 8 km @ 6:30 min/km
- →Wednesday: Tempo run — 2 km easy, 6 km @ 5:20 min/km, 1 km easy
- →Thursday: Rest
- →Friday: Speed — 5 × 1 km @ 5:30 min/km, 90 sec recovery
- →Saturday: Rest
- →Sunday: Long run 16 km @ 6:45 min/km
Race day execution
The most common way to miss sub-2:00 is running the first 5 km too fast. A 10-second-per-km error in the first quarter of the race costs you more than 10 seconds in the final quarter — fatigue compounds.
Start at 5:45–5:50 min/km for the first 5 km regardless of how good you feel. If you still feel good at 15 km, you can push. If you've held back appropriately, you will feel good at 15 km.
Negative splitting — running the second half faster than the first — is the most reliable route to a personal best. Even a difference of 30 seconds between halves significantly improves your finish time relative to what most runners achieve by starting fast and hanging on.