Lauren HollandBy Lauren Holland

Updated November 2026

A first time half marathon plan gives you a clear path from your current fitness to finishing 13.1 miles without injury. Most beginners who already run 15 to 20 minutes without stopping can finish in about 12 weeks by running three days a week, adding one long run that grows each week, and taking at least one full rest day. This guide lays out that structure and the mistakes to avoid.

Check Your Starting Point Before Week 1

A plan only works if you start at the right level. You should be able to run or run-walk for 30 minutes without serious strain. If you can’t, spend two to four weeks building a base first. Your first long run should be around 4 to 6 miles at a conversational pace, meaning you can speak in full sentences.

Shopping for one? See our guide: Furman First Half Marathon Training Plan: 6 Best Picks for Beginners (2026).

Build the Weekly Structure

A beginner half marathon plan typically follows a three-run pattern each week:

  • Easy run (2–3 miles): Conversational pace, two or three days a week.
  • Long run: One session per week, starting at 4 miles and building to 11–12 miles by weeks 10 and 11.
  • Rest or cross-training: At least one full rest day, plus optional walking, cycling or swimming.

Add roughly 10 percent to your weekly mileage at most, and insert a lighter week every fourth week. This is the most common approach used in beginner programs.

Follow the 12-Week Progression

Use the table below as a template. Adjust the long run up or down by a mile if you feel worn out, and repeat any week that felt too hard before moving on.

Weeks Easy Runs Long Run
1–3 2 miles, 3 days 4–5 miles
4–6 2.5–3 miles, 3 days 6–8 miles
7–9 3–4 miles, 3 days 9–10 miles
10–11 3–4 miles, 2–3 days 11–12 miles
12 (race week) 2 miles, 2 days Race day: 13.1 miles

For a more detailed day-by-day version, see First Half Marathon Plan: A 12-Week Guide for Beginners.

Pace Your Runs and Fuel Properly

Most first-timers run their easy days too fast. Use a pace where you could talk comfortably, often 1 to 2 minutes per mile slower than you think you should. On the long run, begin eating a small snack such as a banana or energy chew about 45 minutes in, then every 30 to 45 minutes after that. Practice your race-day breakfast on at least two long runs so nothing surprises you on the course.

For goal setting, see What's a Good First Half Marathon Time? Realistic Goals for Beginners before you choose a target pace.

Common Mistakes to Avoid

  • Increasing mileage faster than 10 percent a week, which is the most frequent cause of shin and knee pain.
  • Skipping rest days because you feel fine.
  • Trying new shoes, gels or hydration on race day instead of during training.
  • Running every easy day at race pace.
  • Ignoring pain that lasts more than a few days. Stop and see a sports medicine clinician or physical therapist if pain persists.
  • Running shoes fitted at a specialty store: A well-fitted pair reduces the risk of overuse injuries over 13 miles. View on Amazon
  • Moisture-wicking running socks: They help prevent blisters on long runs. View on Amazon
  • Energy chews or gels: Practice with them during long runs so your stomach is used to them on race day. View on Amazon

FAQ

How long does a first half marathon plan usually take?

Most beginner plans run 12 to 16 weeks. A 12-week schedule works well if you already run three days a week for 20 to 30 minutes.

Can I run a half marathon with only run-walk training?

Yes. Run-walk intervals such as 4 minutes running and 1 minute walking are a common and effective strategy for first-timers. Many experienced runners use them in their own races.

How many days a week should I train?

Three to four running days is enough for most beginners, with at least one full rest day. Consult a doctor before starting if you have a heart condition, joint problems or other health concerns.

Conclusion

A first time half marathon plan works best when you build gradually, keep most runs easy, and rest when your body asks for it. Follow the 12-week structure, practice your fueling and shoes on long runs, and you will arrive at the start line prepared. Finishing your first 13.1 miles is a realistic goal for most consistent beginners.

Ready to choose one?

Lauren Holland

About Lauren Holland

Lauren Holland is part of our editorial team and reviews and edits our marathon & half-marathon guides, checking product details against manufacturer specifications and owner feedback.