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Endurancelife Pembrokeshire Marathon training guide

The Endurancelife Pembrokeshire Marathon is a 27.3-mile coastal trail marathon based at Little Haven on Saturday 24 April 2027, with 3,067 ft (about 935 m) of climbing on grass, trail, beach and the Pembrokeshire Coast Path. It is a fully marked course, so no navigation is needed, but the undulating, exposed coast makes it a lot slower than a road marathon.

Race date

April 24, 2027

Distance

Trail marathon · 27.3 miles

Terrain / type

Trail

Status

Confirmed

Kris running at the London Marathon in front of Buckingham Palace
Photo credit

Kris at the London Marathon. Photo: Sportograf.

Nick Hancock running across a bridge at Newport Marathon
Photo credit

Nick Hancock at Newport Marathon. Photo supplied by Maximum Mileage.

Runner in Maximum Mileage kit on a chalk trail during South Downs Way 100
Photo credit

The South Downs Way south east of Chanctonbury Ring by Tim Heaton / Geograph via Wikimedia Commons · CC BY-SA 2.0. Wikimedia 1280px thumbnail; cropped to fit the displayed frame. Image derivative remains CC BY-SA 2.0.

South Downs Way 100. Photo supplied by Maximum Mileage.

Little Haven, Pembrokeshire, Wales, UK

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01 / KNOW THE ROUTE

What the course asks of you

Wild, exposed coast

The organiser describes the Pembrokeshire coastal trails as wild and exposed, with undulating terrain and big views. In practice that means short, steep ups and downs, lots of changes of rhythm and very little shelter if the wind picks up. Expect to run it by effort rather than by mile splits.

Grass, trail, beach and coast path

The surface changes all the time. Grass and coast path can be slippery after rain, and the beach sections take more out of your legs than you expect. Shoes with decent grip and a little cushioning make sense here, and you will want to have trained in them.

Why the course record tells you something

The men’s record is 3:15:44 for 27.3 miles, which is a long way off what those runners would do on the road. Use that as a guide. If you normally run a four-hour road marathon, plan for a much longer day out here.

02 / BUILD THE BLOCK

How to prepare

Get hills into your legs

With over 900 m of climbing, spread over lots of short climbs rather than one big one, you need to be comfortable going up and down repeatedly. Hilly long runs once a week and some short hill reps will do more for you than extra flat mileage.

Look after your quads

Steep coastal descents are where most people struggle late on. Build regular downhill running into your training through the block, so your legs have adapted by April rather than finding out on the day.

Run on similar ground

Grass, mud, sand and uneven path all ask something different of your ankles and feet. Do some long runs off-road on mixed terrain, and practise eating and drinking from your vest while you are moving over it.

Keep your running and strength work in one place. Explore MaxMile for your Pembrokeshire preparation, or compare the levels of personal coaching.

03 / PUT IT INTO PRACTICE

Pace the race you have trained for

Forget your road pace. Walk the steep climbs from the start, run the flatter sections at a comfortable effort and let the descents come to you rather than throwing yourself down them.

The first few miles always feel easy because everyone is fresh. If you get to halfway still feeling controlled, you can start to push on the runnable stretches. Most people who blow up on coastal marathons do it by racing the first set of hills.

04 / MAKE ROOM FOR TRAINING

When should your block start?

The Pembrokeshire Marathon is on Saturday 24 April 2027, about 23 weeks from mid November 2026. That gives you a winter base phase and then a 16-week block from early January, with Christmas comfortably out of the way.

Your biggest hilly long runs belong in March and early April, ideally on coast path or similar rough, hilly trail. Then taper for about two weeks. Spring on the Welsh coast can be wet and windy, so do some training in poor weather and test your waterproof and layers before race day.

05 / SORT THE PRACTICAL BITS

Kit and race-weekend planning

Check the participant manual for the mandatory kit list and timings for your distance, and watch the mandatory safety video during online check-in. All-day parking can be added for £3 when you book, and the organiser says parking charges may apply, so read the manual before you travel.

Little Haven is a small coastal village, so plan accommodation and travel early. The organiser suggests The Castle in Little Haven for food and drinks after the race.

YOUR TRAINING, YOUR SUPPORT

How would you like to prepare?

Work with a human coach or use MaxMile for app-led training. Choose the support that fits how you like to run.

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BEFORE YOU START

Your questions, answered

Do I need to navigate?

No. The organiser says the course is fully marked, with easy-to-follow signs and no navigation required.

Can I transfer or change my entry?

The organiser offers a full refund if you change your mind within 30 days of booking, a change to another event up to 30 days before, and a transfer to a friend up to 14 days before. Admin fees may apply to some changes.

How long will it take me?

Much longer than a road marathon. The terrain, the climbing and the weather all slow you down, so plan by effort and time on feet.

Is there a shorter option?

Yes. The same event has a 10K, a half marathon and an ultra.

Sources and checks

Fact-checked 20 October 2026

Event facts checked on 11 November 2026: Endurancelife Pembrokeshire event page.

The ascent figure in metres is our own conversion from the organiser’s 3,067 ft. Start times, the mandatory kit list and checkpoint details are in the participant manual, which we did not reproduce here.

This is an independent Maximum Mileage training guide, not an organiser publication or an official event partnership. Race arrangements can change. Use the organiser’s final instructions for the edition you enter and adapt training to your current running and recovery.

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