Half Marathon Training Plan: A 12-Week Schedule for Your First 13.1

The half marathon is the distance that taught me respect. A 5K lets you fake a lot with adrenaline. A 10K punishes bad pacing. But 13.1 miles exposes the whole system: your easy pace, your long run discipline, your shoes, your breakfast, your patience, and whether you secretly race every training run.

This is the plan I wish I had before my first half: not a spreadsheet full of heroic workouts, but a usable week-by-week build that leaves room for work, family, weather, missed runs, and normal human legs. The goal is simple: get to the start line healthy, confident, and boringly prepared.

If you are not yet running 3 miles comfortably, start with how far a beginner should run or a 5K training plan first. If you already have a 10K base, this plan is the natural next step after a 10K training plan.

What is in this guideClick to expand

1. Readiness check
2. 12-week plan
3. Training paces
4. Workout types
5. How to adjust the plan
6. Long run rules
7. Strength training
8. Fueling
9. Injury prevention
10. Missed run rules
11. Taper
12. Race day
13. Post-race recovery
14. FAQ

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Am I Ready for a Half Marathon Training Plan?

You do not need to be fast. You do need a base. The safest version of this plan starts when your body already understands regular running. Your lungs may adapt quickly, but tendons, calves, hips, and feet are slower students.

Readiness check	Green light	If not yet
Current weekly mileage	12-15 miles for at least 3-4 weeks	Build with easy aerobic running first
Longest recent run	4-6 miles comfortable	Spend 3-4 weeks extending the long run gradually
Run frequency	3-4 runs per week	Start with consistency before adding mileage
Injury status	No worsening pain during or after runs	Read injury prevention first
Life schedule	4 run slots plus 1-2 short strength slots	Use run-walk or a longer plan

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The Complete 12-Week Half Marathon Training Plan

This schedule uses four run days most weeks: two easy runs, one workout or steady run, and one long run. Strength is short and practical. Cross-training can replace an easy run if your legs need less impact.

Week	Total	Tue	Thu	Sat	Sun Long Run	Strength
1	14 mi	3 mi easy + 4 strides	3 mi easy	3 mi easy	5 mi easy	2 x 20 min strength
2	15 mi	3 mi easy	4 mi with 6 x 30 sec pickups	3 mi easy	5 mi easy	2 x strength
3	17 mi	3 mi easy + strides	4 mi steady finish	3 mi easy	7 mi easy	2 x strength
4	13 mi	3 mi easy	3 mi easy	2 mi easy	5 mi cutback	Mobility focus
5	18 mi	4 mi easy	5 mi with 2 mi steady	3 mi easy	6 mi easy	2 x strength
6	20 mi	4 mi easy + strides	5 mi with 6 x 1 min strong	3 mi easy	8 mi easy	2 x strength
7	22 mi	4 mi easy	6 mi with 3 mi at goal HM effort	3 mi recovery	9 mi easy	1-2 x strength
8	17 mi	3 mi easy	4 mi relaxed fartlek	3 mi easy	7 mi cutback	Mobility + light strength
9	24 mi	4 mi easy + strides	6 mi with 2 x 2 mi steady	4 mi easy	10 mi easy	1-2 x strength
10	25 mi	5 mi easy	6 mi with 4 mi at goal HM effort	3 mi recovery	11 mi easy	Light strength only
11	18 mi	4 mi easy	5 mi with 2 mi at goal pace	3 mi easy	6 mi easy	Mobility only
12	16-18 mi	3 mi easy + strides	3 mi easy	2 mi shakeout	Race: 13.1 mi	No heavy lifting

The plan peaks at about 25 miles because most first-time half marathoners do better with consistency than with one giant long run. Your longest run is 11 miles, not 13.1. That is intentional. Race day gives you the final 2.1 miles with taper, fuel, crowds, and a bib on your shirt.

If you need a run-walk version

Use the same weekly structure, but run the long runs with intervals like 4 minutes run / 1 minute walk or 9 minutes run / 1 minute walk. There is no shame in this. The run-walk method is a pacing tool, not a beginner scarlet letter.

If you have more than 12 weeks

Do not make every week bigger just because you have time. Add a base block before Week 1. Spend 3-6 weeks running easy, building from three runs to four, and making 5-6 miles feel normal. The better your base, the less dramatic the plan feels.

If you only have 8-10 weeks

You can still finish if you already have the base, but you should remove ambition before you remove recovery. Keep the long runs, keep easy pace honest, and skip the more aggressive goal-pace work. An undercooked but healthy runner beats an overtrained runner with a pretty spreadsheet.

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How to Set Your Half Marathon Training Paces

Most failed half marathon plans are not ruined by the long run. They are ruined by easy runs that are not easy. If you finish every Tuesday and Thursday feeling like you proved something, you are probably spending the adaptation you need for Sunday.

Run type	Effort	Talk test	Purpose
Easy run	RPE 3-4/10	Full sentences	Aerobic base and recovery
Recovery run	RPE 2-3/10	Almost too easy	Circulation without more stress
Steady run	RPE 5-6/10	Short phrases	Controlled stamina
Goal half marathon pace	RPE 6-7/10	A few words	Race-specific rhythm
Strides	Fast but relaxed	Not a fitness test	Turnover and mechanics

If you struggle here, use your easy run pace as the anchor. If breathing is the problem, pair that with how to breathe while running before adding more intensity.

Half marathon pace calculator without a calculator

If you have a recent 10K, a rough starting point is your 10K pace plus 20-35 seconds per mile. If your 10K was a hard race and you have solid endurance, use the smaller end. If you are new to longer distances, use the larger end or ignore pace entirely and race by effort.

Goal finish	Average pace per mile	Smart first 3 miles
1:45	8:00/mi	8:05-8:10/mi
1:50	8:24/mi	8:30/mi
2:00	9:09/mi	9:15-9:20/mi
2:10	9:55/mi	10:00-10:05/mi
2:20	10:41/mi	10:45-10:55/mi
2:30	11:27/mi	11:30-11:40/mi

The first three miles should feel conservative enough that you wonder if you are being too careful. Good. That feeling is cheaper than panic at mile ten.

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What Each Workout Means

Easy runs

Easy runs should feel almost suspiciously comfortable. They build the aerobic engine and give your joints repeated low-intensity exposure. They are not filler. They are the reason the long run stops feeling like a weekly emergency.

Strides

Strides are 15-25 second relaxed accelerations after an easy run. They keep the legs awake without turning the day into a workout. If they are new to you, read strides running and keep them smooth, not sprinty.

Steady and goal-pace miles

These are controlled stamina pieces, not races. A steady finish or goal-pace block teaches you how half marathon rhythm feels when you are already a little tired. If you want more detail, my tempo run guide explains the difference between threshold, tempo, and controlled steady work.

Fartlek and short pickups

Short pickups let you touch speed without a track. They are useful for newer half marathoners because they build rhythm while keeping pressure low. See fartlek training if you want more variations.

Recovery runs

Recovery runs are intentionally slow. If you cannot keep them easy, walk or cross-train. My full guide to recovery runs goes deeper, but the short version is this: they should make tomorrow better.

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How to Adjust the Plan for Your Goal

Not every half marathoner is chasing the same race. Some people want to finish smiling. Some want to break 2:00. Some are using the half as a bridge to the marathon. The weekly skeleton can stay the same, but the emphasis changes.

Goal	Keep	Adjust
Finish healthy	Four runs, easy long runs, strength	Use run-walk if needed; skip goal-pace pressure
Break 2:30	Consistency and long-run confidence	Practice controlled first miles and fueling
Break 2:00	One weekly goal-pace or tempo block	Long run can include short steady finish after Week 7
PR attempt	Higher weekly volume if already durable	Add one quality session every 7-10 days, not two hard days weekly by default
Marathon bridge	Long-run fueling and easy volume	After recovery, transition to marathon training

Three-day version

If you can only run three days per week, keep one easy run, one workout or steady run, and the long run. Replace the second easy run with low-impact cross-training. Do not remove the rest day before the long run unless your body handles it well.

Five-day version

If you already run five days per week, add a short recovery run of 2-4 miles after the workout day or after the long run. Do not add another hard session just because you have another day. More days should first mean more easy volume.

Treadmill version

Treadmill training can work if weather, safety, or schedule demands it. Keep easy runs easy, vary incline slightly, and do some outdoor long runs before race day if possible. If you split training indoors and outdoors, read treadmill vs outdoor running so race-day pavement does not feel like a surprise.

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Long Run Rules for Half Marathon Training

The long run is the emotional center of half marathon training, but it should not become the whole plan. A long run that is half or more of your weekly mileage is a red flag for many runners because the rest of the week is too thin to support it.

• Run most long runs easy enough that you could speak in sentences.
• Do not race the final mile just because the watch looks nice.
• Practice breakfast and fuel on long runs, not on race morning.
• Use cutback weeks. Week 4 and Week 8 are there to keep you adapting.
• Stop chasing 13.1 in training. An 10-11 mile peak long run is enough for many first-timers if weekly volume is consistent.

If long runs always leave you wrecked, read how to run longer without getting tired. Usually the fix is simpler than expected: slower early miles, more consistent weekday volume, better fueling, or fewer ego miles.

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Strength Training for Half Marathon Runners

You do not need a complicated gym plan. You need enough strength that your form does not fall apart after mile nine. I care most about calves, glutes, hamstrings, hips, and trunk control.

Exercise	Dose	Why it matters
Split squat	2-3 x 6-8/side	Single-leg strength for stance phase
Romanian deadlift	2-3 x 6-8	Hamstring and glute strength
Step-up	2-3 x 6/side	Hill and late-race drive
Calf raise	3 x 10-15	Achilles and calf capacity
Side plank	2 x 30-45 sec/side	Pelvic control when tired
Dead bug or bird dog	2 x 8/side	Trunk stability without frying legs

Keep heavy strength away from the hardest run days if you can. If knee pain has been an issue, read runner’s knee and running shoes for knee pain before you assume the answer is more mileage.

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Half Marathon Fueling: Training Runs and Race Day

A half marathon is long enough that fueling can matter, especially if you will be out there longer than 90 minutes. The mistake is waiting until race morning to find out what your stomach thinks about gels.

Situation	Fueling move	Notes
Easy run under 60 min	Usually water is enough	Eat normally before/after
Long run 75-90 min	Practice small carb intake if needed	Useful for sensitive stomach testing
Long run 90+ min	30-45g carbs/hour as tolerated	Gels, chews, sports drink, or real-food options
Race morning	Carb-focused breakfast 2-3 hours out	Nothing new
During race	1 gel around 35-45 min, another around 70-80 min if needed	Adjust for pace and stomach

For the full food side, use half marathon nutrition and foods to avoid before running. If gels bother your stomach, start with energy gels for sensitive stomachs.

My simple long-run fuel test

On your first 8-mile run, take one gel or equivalent carb source around 40-45 minutes with water. Do not wait until you feel bad. On the 9-10 mile runs, repeat the same plan and note your stomach, energy, and bathroom urgency. By race week, the fuel plan should feel boring.

What not to do before long runs

Do not eat a huge high-fiber dinner the night before, do not try a new protein bar in the car, and do not use race morning as a coffee experiment. The half marathon is short enough that you can survive a fueling mistake, but long enough that it will annoy you for a very long time.

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Injury Prevention: What Usually Breaks First

Half marathon training is not dangerous, but it is honest. If you add distance faster than your tissues can absorb it, the body sends invoices: shin pain, runner’s knee, Achilles irritation, plantar fascia grumbling, or hip tightness that changes your stride.

Warning sign	Common cause	First adjustment
Shin pain	Mileage jump, hard surfaces, old shoes	Cut volume, check shin splints prevention
Knee ache	Weak hips, too much downhill, pace creep	Reduce intensity, add strength, avoid racing easy days
Achilles tightness	Hills, low-drop shoes, speed added too fast	Back off hills; consider Achilles-friendly shoes
Blisters	Sock/shoe friction, wet feet	Upgrade socks; see blister-preventing socks
Chafing	Long-run sweat and fabric rub	Use lube and fit; see chafing prevention

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What to Do If You Miss a Run

This plan assumes life will happen. The best runners are not the ones who never miss days. They are the ones who do not turn one missed run into three bad decisions.

What happened	What to do	What not to do
Missed easy run	Skip it and continue	Add it to the long run
Missed workout	Do the next scheduled run easy or move workout if fresh	Stack workout and long run back-to-back
Missed long run	If early in plan, continue; if peak week, repeat the week if possible	Jump from 7 to 11 miles
Sick for 3+ days	Resume with 50-70% volume for several days	Restart hard workouts immediately
Nagging pain	Replace with cross-training or rest	Test it every morning with another run

Cross-training is useful here. Bike, elliptical, pool running, hiking, and rowing can maintain aerobic work without more impact. My cross training for runners guide gives practical swaps.

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The Taper: What to Do in the Final 2 Weeks

The taper feels wrong because fitness is invisible and anxiety is loud. You reduce mileage so fatigue drops while fitness stays. That does not mean you sit on the couch for two weeks. It means you keep the legs familiar with running while removing the heavy load.

• Do not add missed long runs into taper.
• Keep a few short strides so the legs do not feel stale.
• Reduce strength training to light mobility and activation.
• Sleep more aggressively than you train.
• Avoid new shoes, new foods, new workouts, and new confidence tricks.

Taper week is also when runners suddenly question everything. If you need something productive to do, check gear: shoes from best running shoes, socks, anti-chafe, bib pins, race breakfast, and weather kit.

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Race Day Strategy for Your First Half Marathon

Start slower than your ambition

The first 3 miles should feel too easy. That is not a mistake. That is the plan working. If you feel brave at mile two, ignore it. Bravery is cheaper at mile ten.

Race segment	Effort	What to think
Miles 1-3	Controlled easy-steady	Do not cash the check yet
Miles 4-8	Goal rhythm	Relax shoulders, sip, fuel
Miles 9-11	Patient pressure	Hold form, do not surge wildly
Miles 12-13.1	Race what is left	Use arms, pass people, finish honest

Race morning timeline

Time	Action
3 hours before	Wake up, familiar breakfast, normal coffee if used
2 hours before	Sip fluids, bathroom, get dressed
60 minutes before	Arrive, bib, bag check, easy walking
20 minutes before	Light jog or brisk walk, dynamic mobility
10 minutes before	Final bathroom if possible, small sips only
Start	First mile controlled, no weaving

If the course is hilly, adjust effort rather than forcing pace uphill. My uphill and downhill running tips guide covers how to handle grades without shredding your quads.

Hot, cold, rain, and wind adjustments

Weather changes the race. In heat, slow the goal and drink earlier. In cold, warm up longer and do not overdress. In rain, protect feet and phone, and expect turns to feel slick. For bad-weather prep, use running in the rain and winter running gear as needed.

Wind deserves its own mention. If the course has a headwind early, tuck behind a group if possible and run effort, not watch pace. If you get a tailwind late, then you can spend it. Fighting wind alone in the first half is one of the quietest ways to ruin a good race.

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Gear for Half Marathon Training

You do not need a closet full of gear, but a few items matter more as runs get longer: shoes that are not dead, socks that do not blister, fuel you can carry, and weather gear that matches your race season.

• Choose shoes that match your foot and mileage, not just the fastest ad. Start with running shoes for beginners or long-distance running shoes.
• If you want a lighter workout shoe for tempo days, see lightweight running shoes.
• Replace worn shoes before the peak weeks; use when to replace running shoes as a check.
• Use socks that survive double-digit runs. I trust technical running socks more than cotton; see running socks to prevent blisters.
• For hot races, plan hydration and clothing with running in heat in mind.

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Post-Race Recovery: The First 2 Weeks

The half marathon is short enough that you may feel surprisingly fine the next day and long enough that this feeling can lie to you. Soreness is not the only sign of damage. Your connective tissue, immune system, and nervous system still took a real hit.

Time after race	What to do	What to avoid
First 24 hours	Walk, eat, hydrate, light mobility	Hard stretching or revenge workouts
Days 2-3	Rest or very easy walk	Testing fitness because legs feel okay
Days 4-7	Short easy jogs if soreness is low	Speed work
Week 2	Return to easy running rhythm	Starting a hard plan immediately
After 2 weeks	Choose next goal	Ignoring lingering pain

If you want to keep momentum, start with easy movement and rest days for runners. The fastest way to lose the fitness you built is to turn post-race excitement into an injury.

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Frequently Asked Questions

How long should a half marathon training plan be?

Most runners do well with 12 weeks if they already have a base of about 12-15 miles per week and can run 3-4 miles comfortably. True beginners may need 16-20 weeks because they need time to build durability before race-specific training.

Can a beginner train for a half marathon in 12 weeks?

Yes, if the beginner already runs consistently. If you are starting from zero, 12 weeks is usually too aggressive. Build a 5K or 10K base first, then begin half marathon training.

How many days a week should I run for a half marathon?

Most first-time half marathoners should run 4 days per week. Three days can work with run-walk training and cross-training, while five days is better for experienced runners with time goals.

What is the longest run before a half marathon?

For many first-time runners, 10-11 miles is enough if weekly mileage is consistent. You do not need to run 13.1 miles before race day.

What weekly mileage do I need for a half marathon?

A practical beginner range is about 15-25 miles per week during the main build. This plan peaks around 25 miles and keeps the long run proportional to the rest of the week.

Should I do speed work during half marathon training?

First-timers need mostly easy mileage. Light strides, fartlek, and controlled goal-pace miles are enough. Save aggressive intervals for later training cycles unless you already have a strong base.

What pace should my long runs be?

Most long runs should be easy conversational pace. If you cannot speak in sentences, you are likely running too hard for the purpose of the day.

How should I fuel a half marathon?

Practice carbs on long runs. Many runners use 30-45 grams of carbohydrate per hour for efforts over 90 minutes, but the exact plan depends on pace, gut tolerance, and breakfast.

Can I walk during a half marathon?

Yes. Planned walk breaks can help first-time half marathoners control effort and finish stronger. The run-walk method is a strategy, not a failure.

What should I do if I miss a week of training?

Do not cram the missed mileage. Resume at a reduced load, repeat the week if needed, and protect the next long run. Consistency over the full block matters more than one perfect week.

When should I taper for a half marathon?

Most runners should taper for 1-2 weeks. This plan reduces volume in Weeks 11 and 12 while keeping light running and a few strides so the legs stay fresh.

What is a good first half marathon time?

A good first half marathon time is one you can finish healthy and proud of. Many first-timers finish between about 2:00 and 2:45, but course, weather, training history, and run-walk strategy matter more than comparison.

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The Bottom Line

A good half marathon training plan does not make you prove fitness every day. It gives every run a job. Easy days build the engine. Long runs build confidence. Goal-pace work teaches rhythm. Strength keeps the chassis together. Taper lets the work show up.

If you follow this plan with patience, you will not need to run 13.1 miles in training to believe you can run 13.1 on race day. You will have twelve weeks of evidence.