12-Week Half Marathon Training Plan
The most popular half marathon training duration with two complete schedules. Finish Strong for first-timers targeting 2:00 to 2:30, and Race Ready for runners chasing sub-2:00. Full week-by-week schedules, taper strategy, and race day pacing.
Is 12 Weeks Enough for a Half Marathon?
Yes. 12 weeks is the sweet spot for half marathon training. It is long enough to build endurance progressively and include recovery weeks, but short enough to stay motivated and avoid burnout. Most published training plans from coaches and running organizations use a 12-week framework.
There is one important condition: you should be able to run 4 to 6 miles comfortably before starting week 1. If you cannot do that yet, spend 3 to 4 weeks building your base first. Jumping into a half marathon plan without a running base dramatically increases your injury risk.
Before you start, make sure you can:
Run 4 to 6 miles without stopping
Run 3 to 4 days per week consistently for at least a month
Complete 12 to 15 miles per week without persistent soreness
Run at a comfortable, conversational pace for 45 to 60 minutes
Choose Your Level
Finish Strong
For first-timers or those targeting 2:00 to 2:30
Race Ready
For runners targeting sub-2:00
Weekly Mileage Progression
Level 1: Finish Strong (2:00 to 2:30 Goal)
This plan is designed for first-time half marathoners and runners returning after a break. It uses 3 run days per week plus one cross-training session. No speed work is required. The focus is on gradually building your long run to 11 miles and arriving at the start line healthy and confident. All runs are at an easy, conversational pace.
Level 2: Race Ready (Sub-2:00 Goal)
This plan is for runners who have completed a half marathon before or have a solid running base (15+ miles per week). It includes 4 to 5 runs per week with one quality session (tempo or intervals) each week. Long runs include race-pace finish sections to practice running fast on tired legs. The weekly mileage peaks at 33 miles in week 9 before a 2-week taper.
Key Workouts Explained
Easy Run
The foundation of your training. Run at a pace where you can hold a conversation without gasping. This should feel comfortable and sustainable. About 70 to 80% of your total mileage should be easy.
Pace: 60 to 90 seconds per mile slower than your goal race pace
Tempo Run
A sustained effort at "comfortably hard" pace. You can speak in short sentences but not carry a conversation. Tempo runs improve your lactate threshold, which is the pace at which fatigue starts accumulating. The Race Ready plan includes one tempo per week starting in week 1.
Pace: 25 to 30 seconds per mile slower than your 5K pace, or about 15 to 20 seconds faster than half marathon goal pace
Intervals
Short, fast repeats (800m to 1000m) with recovery jogs between sets. Intervals build VO2max, speed, and running economy. They feel hard but the recovery periods keep the session manageable. Only in the Race Ready plan.
Pace: At or slightly faster than your current 5K race pace
Long Run
The most important run of the week. It builds endurance, teaches your body to burn fat for fuel, and prepares you mentally for race distance. Increase distance by 1 to 2 miles per week, with a recovery week every 4th week where the long run is shorter.
Pace: Same as easy run pace, or even 10 to 15 seconds per mile slower
Cross-Training
Low-impact aerobic activity: cycling, swimming, elliptical, or yoga. Cross-training builds cardiovascular fitness without adding running impact. It also helps with active recovery between run days.
Pace: Moderate effort, keep your heart rate in zone 2
The 2-Week Taper: Weeks 11 and 12
The taper is where your training becomes your fitness. You have done the hard work. Now your body needs time to absorb it. Reducing mileage in the final 2 weeks feels counterintuitive, but it is the most important phase of the plan. You will not lose any fitness in 2 weeks. You will gain freshness, replenish glycogen stores, and repair micro-damage in your muscles.
Week 11: Pre-Taper
Reduce total mileage by 25 to 30%
Keep one quality session but shorten it
Long run drops to 8 miles (Finish Strong) or 8 miles (Race Ready)
Sleep 8+ hours every night
Begin carb-loading strategy: increase carbs by 15 to 20%
Week 12: Race Week
Reduce mileage by 50% from peak
Only 2 to 3 short, easy runs
Include a few strides to keep legs sharp
No hard workouts after Wednesday
Rest completely on Friday before Saturday race
Focus on sleep, hydration, and nutrition
Race Day Pacing Strategy
Finish Strong: Even Split Strategy
Run the same pace from start to finish. Your first mile should feel easy. If it does not, you are going too fast. Settle into your target pace by mile 2 and hold it steady. Do not speed up when you feel good at mile 4 and do not panic if you feel tired at mile 10. Trust the pace.
2:00 goal: 9:09/mi every mile. First mile at 9:15 to 9:20 to account for crowd congestion.
Race Ready: Negative Split Strategy
Run the first half 10 to 15 seconds per mile slower than goal pace. At mile 7 to 8, begin picking up the pace. By mile 10, you should be at or slightly faster than goal pace. The last 5K is where you race. This strategy prevents the painful death march that happens when you go out too fast.
1:55 goal: Miles 1 to 7 at 8:55/mi. Miles 8 to 11 at 8:40/mi. Miles 12 to 13.1 at 8:30/mi or faster.
Use our race pace calculator to plan exact mile-by-mile splits, and our training pace calculator for workout paces.
Long Run Fueling Guide
Your long runs are the perfect time to practice race day nutrition. Never try a new gel, drink, or food on race day. Use training runs to find what works for your stomach and dial in your timing. Here is a simple guide based on how long you will be running.
Water only. No gels or sports drink needed for runs under an hour.
Water and optionally a few sips of sports drink in the last 20 minutes. You are fine without gels.
Bring one gel and take it around the 45-minute mark with water. This is your chance to practice race-day fueling.
Take a gel every 30 to 40 minutes starting at minute 40. Always wash gels down with water, not sports drink, to avoid stomach issues. Practice your exact race-day fueling strategy.
For personalized fueling recommendations based on your weight and goal time, use our race fueling calculator.
About This 12-Week Half Marathon Training Plan
This is a free 12-week half marathon training plan published by Motera, a gamified running app for iOS. The plan comes in two levels. Level 1, called Finish Strong, is designed for first-time half marathoners or runners returning after a break. It uses 3 runs per week plus cross-training and peaks at 19 miles per week. Level 2, called Race Ready, is for experienced runners targeting a sub-2:00 finish. It uses 4 to 5 runs per week with tempo and interval sessions, peaking at 33 miles per week.
Both plans include recovery weeks at weeks 4 and 8 and a 2-week taper in weeks 11 and 12. The prerequisite for starting either plan is the ability to run 4 to 6 miles comfortably. The plans follow standard periodization principles used by running coaches worldwide: build volume gradually, include recovery weeks every 3 to 4 weeks, peak volume 3 weeks before race day, and taper for 2 weeks.
Make Easy Runs Fun Again
12 weeks of training means a lot of easy miles. Motera makes those miles exciting by turning every run into a territory capture mission. Run loops to claim zones on a real map, explore new neighborhoods through Fog of War, and climb the leaderboard with every kilometer.
Instead of dreading your Tuesday 4-miler, you will be strategically expanding your territory. Motera adds purpose to the 80% of your training that is supposed to be easy and often feels boring.
MoteraFrequently Asked Questions
Is 12 weeks enough to train for a half marathon?
Yes, 12 weeks is the most popular and effective training duration for a half marathon. It gives you enough time to build long run endurance, add quality workouts, and taper properly. The key prerequisite is that you can already run 4 to 6 miles comfortably before starting week 1. If you cannot, spend a few weeks building that base first.
How many miles per week should I run during half marathon training?
For the Finish Strong plan (first-timers), weekly mileage starts around 12 to 14 miles and peaks at 26 to 28 miles in week 9. For the Race Ready plan (sub-2:00), weekly mileage starts around 18 to 20 miles and peaks at 33 to 35 miles in week 9. The taper reduces volume by 30 to 40% in the final two weeks.
What should my longest run be before race day?
The Finish Strong plan peaks at 11 miles. The Race Ready plan peaks at 12 miles with the last 3 at race pace. You do not need to run the full 13.1 miles in training. Race day adrenaline, crowd energy, and your taper will carry you the remaining distance. Running the full distance in training adds injury risk without meaningful fitness benefit.
What is a taper and when does it start in a 12-week plan?
A taper is a planned reduction in training volume to allow your body to recover and arrive at race day fresh. In this 12-week plan, the taper begins in week 11 with a 30% mileage reduction and continues through week 12 (race week) with a 50% reduction. You maintain some intensity but cut volume significantly.
Can I skip runs during a 12-week plan and still finish the race?
Missing one run per week is generally fine as long as it is not your long run. The long run is the most important workout in half marathon training. If you miss a weekday run, do not try to make it up by doubling the next day. Just move forward with the schedule. Consistency over 12 weeks matters more than any single workout.
What pace should my easy runs be at?
Easy runs should be 60 to 90 seconds per mile slower than your goal half marathon pace. You should be able to hold a conversation without gasping. Most people run their easy runs too fast. For a 2:00 half marathon goal (9:09/mi race pace), your easy runs should be around 10:00 to 10:45 per mile.
Should I run on back-to-back days?
The Finish Strong plan never has back-to-back run days, always alternating with rest or cross-training. The Race Ready plan does include some consecutive run days (typically easy run followed by another easy run). If you feel persistent fatigue or pain, take an extra rest day. It is always better to arrive at a workout healthy than to grind through exhaustion.
What cross-training is best during half marathon training?
The best cross-training options are cycling, swimming, elliptical, and yoga. These activities build cardiovascular fitness without the impact stress of running. Strength training (squats, lunges, planks, single-leg exercises) twice per week is also highly recommended to prevent injuries and improve running economy. Avoid high-impact sports like basketball or soccer that increase injury risk.
