Health & Fitness: How Far Is a Half Marathon? 

A half marathon is 13.1 miles, or 21.1 kilometres. It’s exactly half the distance of a full marathon (26.2 miles), and it’s become one of the most popular race distances for runners — challenging enough to feel like a real achievement, but achievable for most people with the right preparation.

How Long Does It Take to Train for a Half Marathon?

Training time depends on your current fitness level. If you’re starting from scratch — no running experience at all — you’ll need around 12 to 16 weeks to prepare safely and build up gradually.

If you already run a few times a week, you might be ready in 8 to 10 weeks, depending on your base mileage.

You should aim to train 3 to 4 times a week, gradually increasing your long runs, improving your endurance, and mixing in some speed or hill work.

How to Train for a Half Marathon (Beginner-Friendly)

Start Slow and Build Gradually

The golden rule: don’t increase your weekly mileage by more than 10% to avoid injury. Begin with a mix of walk/run intervals, then slowly increase your running time and reduce walking as you improve.

Include One Long Run Per Week

Your weekly long run is key. Start with 3–4 miles and build up each week until you're regularly doing 10–12 miles before race day. Long runs build stamina and confidence.

Don’t Forget Rest and Cross-Training

Rest days are just as important as running days. Include 1–2 days of rest or low-impact activities like swimming, cycling, or yoga to keep your body in balance.

Taper Before the Race

Reduce mileage in the last 1–2 weeks before the race to allow your body to recover and be fresh for race day.

What to Bring to a Half Marathon

Preparation is key. Here’s what you’ll want to have:

• Running shoes you’ve trained in – never wear brand new shoes on race day

• Comfortable, weather-appropriate running kit – including a lightweight waterproof if rain is expected

• Race number and safety pins (usually provided by the organiser)

• Water bottle or hydration pack – or know where the water stations are

• Energy gels or chews if you're used to them during long runs

• Running watch or app if you track your pace or distance

• Post-race snacks, warm clothing, and a towel – many races don’t provide these

What to Expect During a Half Marathon

The Atmosphere

Race day is buzzing with energy. You'll likely find crowds cheering, music, and water stations every few miles. Use the atmosphere to boost your morale — it's one of the joys of racing.

The First Few Miles

It’s tempting to go out fast, but start slower than you feel you can go. Adrenaline will be high, but pacing yourself early prevents a crash later.

The Middle Miles

These are often the toughest. Settle into a rhythm, hydrate when you can, and stick to what you practised.

The Last 2–3 Miles

Your legs will likely feel heavy, but the finish line is close. Crowd support and mental strength play a big part here — focus on one step at a time.

Famous Half Marathons in the UK

Some of the most popular and scenic half marathons in the UK include:

• Great North Run (Newcastle to South Shields) – The world’s biggest half marathon, known for its crowd support and TV coverage

• Royal Parks Half (London) – A stunning route through four of London’s royal parks

• Cardiff Half Marathon – Fast, flat and friendly – great for PB chasers

• Bath Half Marathon – Historic setting with a well-supported city loop

• Brighton Half Marathon – Coastal route with amazing sea views and local buzz

Popular Half Marathons in Europe

Looking to travel for your next race? Here are some bucket-list half marathons across Europe:

• Berlin Half Marathon (Germany) – Fast, flat, and ideal for a PB

• Rome-Ostia Half (Italy) – A beautiful route from Rome to the coast

• Barcelona Half Marathon (Spain) – Scenic city streets with a warm, sunny vibe

• Lisbon Half (Portugal) – Runs across the iconic Vasco da Gama Bridge

• Paris Half (France) – A stylish, major city race with big crowds and landmarks

How to Find Local Running Clubs

Training with others can make a huge difference. You’ll find encouragement, pacing support, and usually a post-run chat or coffee.

To find a club near you:

• Visit England Athletics and use the club finder

• Check your local Facebook groups or park run communities

• Ask in local running shops — many have notice boards or group meetups

• Search “running club near me” on Google — most clubs welcome beginners!

Many clubs cater to all levels and offer beginner programmes, including Couch to 5K and half marathon training support.

Other Tips You Might Not Have Thought Of

• Practice race day fuelling during your long runs — never try something new on race day

• Learn to pace yourself with a watch, running app, or by feel

• Try a few smaller races (like 5Ks or 10Ks) in the lead-up to get used to the race day environment

• Train in all weathers — you can’t control race day conditions

• Enjoy the process – the training journey is just as rewarding as the race itself

Final Thought

A half marathon is 13.1 miles — and while that might sound daunting at first, it’s a highly achievable goal with the right training, mindset, and support. Whether you’re running for charity, fitness, or personal growth, crossing that finish line is an unforgettable experience. Take your time, train smart, and you’ll be well on your way to a brilliant race day.