3 Month Half Marathon Training Plan
Three months is the perfect timeline for a half marathon. This plan breaks the journey into three clear phases: build your base, build your endurance, then peak and race. Two levels included: First Half for beginners and Faster Half for runners chasing a time goal.
Can You Train for a Half Marathon in 3 Months?
Absolutely. Three months (12 weeks) is the most popular half marathon training duration used by coaches and running programs worldwide. It gives you enough time to build endurance gradually, include recovery weeks, add quality workouts, and taper properly before race day. Most runners find that 3 months is long enough to get fully prepared but short enough to stay motivated and focused.
The key requirement is that you can already run 3 or more miles without stopping before starting month 1. If you are starting from scratch, complete a Couch to 5K program first, then begin this plan. Jumping straight into half marathon training without a running base is the fastest path to injury.
You are ready to start if you can:
Run 3 to 5 miles without stopping
Run at least 3 days per week consistently
Complete 10 to 15 miles per week without lingering soreness
Hold a conversation while running at easy pace
Choose Your Level
First Half
For first-timers and returning runners
3 to 4 runs per week
All easy pace, no speed work
Goal: finish 13.1 miles feeling strong
Peak mileage: 19 miles/week
Long run peaks at 11 miles
Target finish: 2:00 to 2:30
Faster Half
For runners chasing a time goal
4 to 5 runs per week
Includes tempo runs and intervals
Goal: run a personal best time
Peak mileage: 33 miles/week
Long run peaks at 12 miles
Target finish: sub-2:00
Month-by-Month Overview
Month 1: Build Your Base
Weeks 1 to 4
Establish consistent running routine. All runs at easy, conversational pace. Build weekly mileage gradually. One recovery week (week 4) to absorb training.
First Half Mileage
10 to 14 mi/week
Faster Half Mileage
18 to 24 mi/week
Long Run
Up to 7 miles
Monthly Checklist
Find your easy pace
Establish a weekly schedule
Start a running log
Recovery week in week 4
Month 2: Build Endurance, Add Speed
Weeks 5 to 8
Extend long runs to double digits. Faster Half adds tempo runs and intervals. First Half stays at easy pace but increases volume. Recovery week in week 8.
First Half Mileage
14 to 18 mi/week
Faster Half Mileage
24 to 30 mi/week
Long Run
Up to 10 miles
Monthly Checklist
Long run reaches 10 miles
Practice race day fueling
Consider a 10K tune-up race
Recovery week in week 8
Month 3: Peak, Taper, and Race
Weeks 9 to 12
Weeks 9 to 10 are peak volume with your longest runs. Weeks 11 to 12 are the taper: reduce volume by 30 to 50 percent while maintaining some intensity. Arrive at race day fresh and ready.
First Half Mileage
5 to 19 mi/week
Faster Half Mileage
9 to 33 mi/week
Long Run
Up to 12 miles, then taper
Monthly Checklist
Peak long run in weeks 9 to 10
Begin taper in week 11
Finalize race day logistics
Race in week 12
Month 1: Build Your Base (Weeks 1 to 4)
The goal of month 1 is simple: build a consistent running habit and gradually increase your mileage. Every run this month should be at easy, conversational pace. If you are breathing too hard to talk in complete sentences, slow down. Week 4 is a recovery week with reduced mileage to let your body absorb the training.
First Half: Month 1
Faster Half: Month 1
Month 2: Build Endurance (Weeks 5 to 8)
Month 2 is where the endurance gains happen. Your long run grows from 7 miles to 10 or 11 miles. The Faster Half plan adds tempo runs and intervals to build speed. The First Half plan stays at easy pace but increases total weekly volume. Week 8 is another recovery week. This is also the ideal month to run a 10K tune-up race to test your fitness and practice race day logistics.
First Half: Month 2
Faster Half: Month 2
Month 3: Peak, Taper, and Race (Weeks 9 to 12)
The final month is a tale of two halves. Weeks 9 and 10 contain your highest mileage and longest runs. Then weeks 11 and 12 are the taper: you reduce volume by 30 to 50 percent while keeping some intensity to stay sharp. The taper feels counterintuitive, but it is where your fitness peaks. You will not lose any conditioning in 2 weeks. You will arrive at race day with fresh legs, full glycogen stores, and repaired muscles.
First Half: Month 3
Faster Half: Month 3
Gear to Buy Each Month
You do not need to buy everything at once. Spread your gear purchases across the 3 months so you can test each item before race day. The most important rule: never use anything new on race day.
Month 1: Essentials
Running shoes
Visit a running store for a gait analysis. Get shoes that match your foot type and running style. Budget $120 to $160.
Moisture-wicking socks
Avoid cotton. Running-specific socks prevent blisters and keep feet dry. Get 3 to 4 pairs.
Comfortable shorts or tights
Anything with a comfortable waistband and no chafing. You do not need expensive gear yet.
Body Glide or Vaseline
Apply to inner thighs, underarms, and nipple area before every run longer than 30 minutes.
Month 2: Upgrades
GPS watch or phone armband
You need to track pace and distance for longer runs. A basic GPS watch ($150 to $250) or a phone armband works.
Hydration belt or handheld bottle
Runs over 60 minutes require fluid. A handheld 10 oz bottle is the simplest option.
Energy gels (sample pack)
Buy a variety pack and test different brands during long runs. Never try a new gel on race day.
Running hat or sunglasses
For sun protection on longer outdoor runs. A lightweight hat with ventilation works best.
Month 3: Race Day Prep
Race day outfit (tested)
Wear your race outfit on at least one long run. Never wear anything new on race day.
Race day gels (your tested brand)
Buy enough for 2 to 3 gels during the race plus one before the start.
Throwaway layer
An old sweatshirt to wear at the start line and discard after mile 1. Race morning is always colder than expected.
Flat lay the night before
Lay out everything: bib, shoes, socks, outfit, gels, watch, Body Glide. Nothing left to chance.
Nutrition: How It Evolves Over 3 Months
Your nutrition strategy should evolve as your training does. Month 1 is about establishing good habits. Month 2 is about learning to fuel during runs. Month 3 is about dialing in your exact race day nutrition plan. Use our race fueling calculator for personalized recommendations.
Month 1: Establish Good Habits
Eat a balanced meal 2 to 3 hours before running
Hydrate consistently throughout the day, not just before runs
No special diet changes needed yet
Post-run: eat protein and carbs within 30 minutes
Avoid running on a full stomach or completely empty
Month 2: Fuel for Performance
Start practicing gel intake on long runs over 60 minutes
Increase carbohydrate portion at dinner before long run days
Carry water on runs over 60 minutes
Experiment with pre-run snacks: banana, toast, oatmeal
Track how different foods affect your runs in a log
Month 3: Race Week Nutrition
Increase carbs by 20% in the final 3 days before race day
Race morning: eat your tested pre-run meal 2.5 to 3 hours before start
Plan gel timing: one before start, one every 35 to 40 minutes during race
Drink 4 to 6 oz of fluid at every aid station
Avoid high-fiber and high-fat foods for 48 hours before the race
About This 3 Month Half Marathon Training Plan
This is a free 3 month half marathon training plan published by Motera, a gamified running app for iOS. The plan is organized by month rather than by week, making it easier to understand the big picture of training progression. Month 1 builds your running base. Month 2 extends your endurance and introduces speed work for the Faster Half level. Month 3 contains your peak training followed by a 2 week taper before race day.
The plan comes in two levels. First Half is designed for beginners running their first half marathon, using 3 to 4 runs per week with all easy pacing. Faster Half is for experienced runners targeting a sub-2:00 finish, using 4 to 5 runs per week with tempo and interval sessions. Both plans require the ability to run at least 3 miles comfortably before starting.
3 Months of Training, 3 Months of Territory
Three months of half marathon training means dozens of easy runs. Motera makes every single one of them purposeful. Run loops to capture territory on a real map, explore new neighborhoods through Fog of War, and watch your empire grow as your fitness builds. By race day, your map will be a visual record of every mile you put in.
Compete on leaderboards, earn XP for every session, and level up alongside your training. Free GPS tracking included.
MoteraFrequently Asked Questions
Can you train for a half marathon in 3 months?
Yes. Three months (12 weeks) is the most common and effective half marathon training duration. The only prerequisite is that you can currently run 3 miles without stopping. If you cannot do that yet, spend 3 to 4 weeks building a base before starting month 1. Most running coaches recommend 12 weeks as the sweet spot between building enough fitness and avoiding burnout.
How many days per week should I run during a 3 month half marathon plan?
The First Half plan uses 3 to 4 running days per week, which is ideal for beginners and people with busy schedules. The Faster Half plan uses 4 to 5 running days per week and includes speed work. Both plans include cross-training and rest days. Running fewer than 3 days per week makes it difficult to build the endurance needed for 13.1 miles.
What should my longest training run be before the half marathon?
The First Half plan peaks at 11 miles and the Faster Half plan peaks at 12 miles. You do not need to run the full 13.1 miles before race day. Race day adrenaline, crowds, and your taper will carry you the remaining distance. Running 13+ miles in training adds injury risk without a meaningful fitness benefit.
Is 3 months enough if I have never run before?
Three months is enough if you can already run 3 miles comfortably. If you are a complete beginner who has never run, you should spend 4 to 6 weeks building a running base first, then start the 3 month plan. A Couch to 5K program followed by this plan is a great 5 to 6 month approach to your first half marathon.
What happens if I miss a week of training?
Missing one week is not a disaster. Do not try to make up the missed mileage by doubling the following week. Instead, repeat the week you missed or simply move forward with the plan. If you miss your long run, that is the most important session to reschedule within a day or two. Consistency over 3 months matters far more than any single week.
Should I do a practice race during the 3 months?
Running a 10K race in month 2 (around weeks 6 to 8) is an excellent idea. It gives you race experience, helps calibrate your half marathon goal pace, and breaks up the training with a fun milestone. Do not race more than once during the 3 months, as each race requires recovery time that takes away from training.
How much should I increase my mileage each month?
Month 1 builds your base with weekly mileage of 10 to 18 miles depending on your level. Month 2 increases by about 20 to 30 percent to 14 to 27 miles per week. Month 3 peaks in the first two weeks then tapers. The general rule is never increase total weekly mileage by more than 10 percent from one week to the next.
What pace should I run my easy runs at during training?
Easy runs should be 60 to 90 seconds per mile slower than your goal half marathon pace. You should be able to hold a full conversation. Most runners go too fast on easy days. For a 2:00 half marathon goal (9:09/mi pace), your easy runs should be around 10:00 to 10:45 per mile. Slowing down on easy days lets you recover properly and run harder on quality days.
Do I need to carb-load before a half marathon?
Light carb-loading for 2 to 3 days before race day is beneficial. Increase your carbohydrate intake by about 20 percent in the final 3 days. This means extra rice, pasta, bread, and potatoes at meals. You do not need to eat enormous plates of pasta the night before. Just shift your meals to be more carb-heavy. Avoid trying any new foods in the last week.
What is the difference between this plan and a 12 week plan?
This plan covers the same 12 week duration but is organized by month instead of by week. Month 1 (weeks 1 to 4) focuses on building your base. Month 2 (weeks 5 to 8) builds endurance and adds speed. Month 3 (weeks 9 to 12) includes your peak mileage, taper, and race. The month-by-month structure makes it easier to see the big picture and understand where you are in the journey.
