Beginner Half Marathon Training Plan
How to Train for Your First 21.1 km
This guide walks you through what a beginner half marathon plan looks like: how long to train, how many days to run, which workouts matter, and six real sample weeks from a 14-week plan aimed at a 2:20 finish. When you're ready, build your own plan in the Running Plan Generator—it adapts to your race date, goal time, and available days.
Who Is a Beginner Half Marathon Plan For?
A beginner half marathon plan fits you if you can run or jog for 40–50 minutes without stopping, or if you've already finished a 10K and want to step up. You don't need to be quick—plans like the one in this guide target a 2:20 finish (about 6:38 min/km), so the focus is on building endurance and finishing strong, not on speed.
If you're not there yet, that's fine. Many runners start with a Couch to 5K programme, then move to a beginner 10K plan, and only then take on the half. That progression gives your body and habits time to adapt so the jump to 21.1 km feels manageable.
How a Half Marathon Differs from a 10K
A 10K is tough but short enough that beginners can push through. A half marathon rewards patience: long runs get longer, weekly volume creeps up, and you need to pace yourself so the last 5 km don't turn into a death march. The trade-off is that half marathon training builds serious aerobic fitness and sets you up for marathons or faster 10Ks later. Our 2-hour half marathon plan is the next step once you've run your first half and want a time goal.
How Long to Train for a Beginner Half Marathon
Most beginner half marathon plans are 12–16 weeks. The sample in this article is 14 weeks with four running days per week—enough time to build long runs gradually and include recovery weeks and a taper.
- 12 weeks – You already run 3–4 times per week and can comfortably cover 8–10 km.
- 14 weeks – You've done a 10K or run regularly but want a gentler build and built-in recovery.
- 16 weeks – You're new to running or returning after a long break; the extra weeks reduce injury risk.
The generator lets you pick your plan length and race date; it then builds every week—including recovery and taper—so you don't have to guess. Generate your half marathon plan and adjust days per week and goal (finish or time) to match your life.
What a Beginner Half Marathon Week Looks Like
The plan in this guide uses four running days: a recovery run, an easy run, a quality day (tempo or intervals), and a long run, plus one strength day. Rest days are non-negotiable—they're when adaptation happens.
Typical Week (Mid-Plan, 4 Days)
- Monday – Recovery run: Short, very easy. Keeps the legs moving without adding stress.
- Wednesday – Quality: Tempo (sustained comfortably hard effort) or intervals (repeats with jog recovery). Introduced after a base phase.
- Thursday – Strength: Core, glutes, and legs. Reduces injury risk; routines are in the generator once you save your plan.
- Friday – Easy run: Conversational pace. The bulk of your volume.
- Sunday – Long run: Builds endurance; later in the plan you'll run part of it at half marathon pace.
Exact distances and paces depend on your goal time and plan length. The generator calculates pace ranges and heart-rate zones for every session—you get a full 14-week schedule, not just a template.
Run Types in a Beginner Half Marathon Plan
Recovery Runs
Short, very easy efforts the day after a long or hard run. Promote blood flow without delaying recovery.
Easy Runs
Conversational pace, most of your weekly volume. Build aerobic fitness and durability.
Long Runs
Your longest run each week, gradually increasing. Later weeks include blocks at half marathon pace.
Tempo & Intervals
Tempo raises lactate threshold; intervals improve speed and economy. Both are phased in after base building.
For more on each type, see the Guide Hub (easy run, long run, tempo, intervals, recovery run, strength training). The generator weaves these into your plan at the right time so you don't do too much too soon.
Sample Weeks from a Beginner Half Marathon Plan (2:20 Goal)
Below are 6 sample weeks from a 14-week beginner half marathon plan with four training days per week, aimed at a 2:20 finish: Weeks 1–2 (Base), Weeks 7–8 (Build and Recovery), and Weeks 11–12 (Peak). This is the level of detail the generator produces—pace ranges, heart-rate zones, and session notes for every day. The full plan includes all 14 weeks plus taper; this excerpt shows how base, build, and peak differ.
Generated by YearRoundRunning Running Plan Generator
Weeks 1–2: Base Phase
| Week & Total Weekly Distance (km) | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|---|---|---|---|---|---|---|---|
| Week 1 Base phase20 km | Recovery Run 4 km 7:47–8:07 min/km (HR Zone 1–2) | Rest | Easy Run 4 km 7:31–7:51 min/km (HR Zone 2) | Strength Training See Workouts. All weeks' routines are available once you save the plan. | Easy Run 3 km 7:31–7:51 min/km (HR Zone 2) | Rest | Long Run 9 km 7:48–8:03 min/km (HR Zone 2–3) |
| Week 2 Base phase24 km | Recovery Run 5 km 7:46–8:06 min/km (HR Zone 1–2) | Rest | Easy Run 5 km 7:30–7:50 min/km (HR Zone 2) | Strength Training | Easy Run 3 km 7:30–7:50 min/km (HR Zone 2) | Rest | Long Run 11 km 7:46–8:01 min/km (HR Zone 2–3) |
Weeks 7–8: Build and Recovery
| Week & Total Weekly Distance (km) | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|---|---|---|---|---|---|---|---|
| Week 7 Build phase34 km | Recovery Run 7 km 7:39–7:59 min/km (HR Zone 1–2) | Rest | Tempo Run 3 km 6:30–6:40 min/km. Warmup then suggested distance at tempo pace (HR Zone 3–4) | Strength Training | Easy Run 9 km 7:23–7:43 min/km (HR Zone 2) | Rest | Long Run 15 km 7:30–7:45 min/km (HR Zone 2–3) |
| Week 8 Recovery week27 km | Recovery Run 5 km 7:49–8:09 min/km (HR Zone 1–2) | Rest | Interval Run 3 km 5:59–6:09 min/km. Warmup then 4–5 min repeats at noted pace w/ 3–4 min jogs between (HR Zone 4–5) | Strength Training | Easy Run 7 km 7:32–7:52 min/km (HR Zone 2) | Rest | Long Run 12 km 7:39–7:54 min/km (HR Zone 2–3) |
Weeks 11–12: Peak Phase
| Week & Total Weekly Distance (km) | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|---|---|---|---|---|---|---|---|
| Week 11 Peak phase42 km | Recovery Run 8 km 7:37–7:57 min/km (HR Zone 1–2) | Rest | Tempo Run 3 km 6:26–6:36 min/km. Warmup then suggested distance at noted pace – practice race rhythm (HR Zone 3–4) | Strength Training | Easy Run 12 km 7:21–7:41 min/km. End with 6–8 × 20–30 sec strides (fast but relaxed) with full recovery walks between (HR Zone 2) | Rest | Long Run 19 km 7:25–7:40 min/km. Last 8 km at HM Pace (HR Zone 2–3) |
| Week 12 Peak phase44 km | Recovery Run 9 km 7:37–7:57 min/km (HR Zone 1–2) | Rest | Interval Run 3 km 5:45–5:55 min/km. Warmup then 3–4 × 1.6 km/1 mi repeats at noted pace w/ 2 min jogs between (HR Zone 4–5) | Strength Training | Easy Run 12 km 7:21–7:41 min/km. End with 6–8 × 20–30 sec strides (fast but relaxed) with full recovery walks between (HR Zone 2) | Rest | Long Run 20 km 7:23–7:38 min/km. Last 5 km at HM Pace. Tip: Doing less distance here is perfectly fine – prioritize your recovery needs as race day approaches (HR Zone 2–3) |
Get the full 14-week plan—every week from start to taper—when you generate your free beginner half marathon plan.
How Many Days per Week for a Beginner Half Marathon?
Four running days is the sweet spot for this plan: enough volume to build toward 21.1 km without overdoing it. You get a recovery run, an easy run, a quality session, and a long run, plus one strength day. Three days can work if life is tight, but you'll need a longer plan or lower weekly distance; the generator can build that.
Five or more days as a beginner increases injury risk. Rest days are when tendons and muscles adapt; skipping them is the fastest way to shin splints or burnout. Stick to four (or three) and use the generator to spread the load.
Pacing for Your First Half Marathon
For a 2:20 half marathon, average pace is about 6:38 min/km (10:40 min/mile). In training, most of your runs are slower than that—easy and recovery runs stay conversational. Tempo and intervals are faster but limited in distance; the plan controls the dose.
If you don't have a time goal, "finish comfortably" is enough. Set that in the generator and it will still give you pace ranges so you don't run easy days too hard. If you want to aim for sub-2:00 later, that's a separate plan—run your first half, recover, then level up.
Mistakes to Avoid in Beginner Half Marathon Training
- Running easy days too fast. If every run feels hard, you're going too quick. Easy and recovery runs should feel genuinely easy; that's how you recover and get fitter.
- Jumping mileage too quickly. Rough rule: no more than 10% extra volume per week. The generator builds in steps and recovery weeks so you don't spike.
- Skipping recovery weeks. Week 8 in the sample is lighter on purpose. These weeks let your body catch up; treat them as part of the plan, not a week off.
- Ditching strength. Even one short session per week (glutes, core, legs) cuts injury risk. The plan includes it; the generator links to routines once you save.
- Going out too fast on race day. Adrenaline makes the first few kilometres feel easy. Hold back; the real race starts around 15 km.
- Not testing fuelling. For 2:20 you may want a gel or two and water. Try them in training so race day isn't a guessing game.
Race Week and Race Day
The plan includes a two-week taper. Trust it: shorter runs, no hard sessions, same rest. Don't cram in extra miles or a "last long run" the week before. Sleep and normal eating matter more than one more workout.
On the day: eat something you've used before, arrive early, warm up with 5–10 minutes easy. Start at or slightly slower than goal pace; lock in by 5 km and hold. If you have energy in the last 3 km, you can push. After the finish, walk, drink, eat, and take a few easy days before running again.
After Your First Half Marathon
Once you've crossed the line, you've got a real base. You can run another half with a time goal (e.g. 2-hour half marathon plan), try a marathon, or stick to halves and 10Ks. The generator can build a plan for whatever you choose next.