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TRAIN FOR THE COURSE

South Downs Way 100 training guide

The climbs, chalk descents and hours after dark all need a place in your preparation. Practise uphill hiking, controlled descending, fuelling and carrying your kit, so race day is not the first time you put them together.

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.

Winchester to Eastbourne, England, UK

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01 / KNOW THE ROUTE

What the course asks of you

Respect the rolling profile

Repeated climbs and descents make this a different job from a flat road ultra. Think in terms of an effort you can repeat on the next hill, not just the hill in front of you. Hiking well is part of racing well here.

Know the race route, not just the National Trail

Centurion's course notes identify a deviation through Washington and direct runners towards Jevington after Alfriston, not the Seven Sisters coastal route. Read the current notes alongside the official route file before recceing. This guide is not turn-by-turn navigation.

Prepare for the final descent

The official notes describe a chalk descent towards the Eastbourne finish. Leave enough control in your legs to descend attentively when tired. Use training to practise foot placement and a comfortable downhill rhythm before adding duration.

Read Centurion's course notes. Do not recce the private Matterley Estate opening section.

02 / BUILD THE BLOCK

How to prepare

Build repeatable climbing and descending

Use terrain that lets you practise the work of the South Downs: sustained uphill effort, efficient hiking and descents you can control. Add downhill exposure progressively rather than dropping a large amount into one weekend.

Practise the whole routine

On suitable longer outings, carry the kit you expect to use and rehearse eating, drinking and checking the route. Practise finding what you need in your pack without turning every stop into a full repack.

Give night running its own rehearsal

Try your headtorch and backup arrangements on a familiar route with sensible safety arrangements. Learn what changes when you can see less of the ground. Do this before combining darkness with your most tiring sessions.

Fit the long work into a recoverable week

A big outing is only one part of the block. Back-to-back days can suit some experienced runners, but they are not a requirement to copy blindly. Use the amount of training you can absorb, then keep the next week productive.

Read more about matching training to trail surfaces and building downhill durability.

03 / PUT IT INTO PRACTICE

Pace the race you have trained for

Use effort rather than one average pace across climbs, descents and runnable sections. Decide in advance how you will approach the steeper ground, including when you will hike. That keeps the opening hours from becoming a test of how long you can refuse to walk.

Build a checkpoint plan that includes time spent stopped, using the organiser's current cut-offs. Keep your fuelling and kit routine simple enough to follow when tired. In the later stages, concentrate on the next manageable section and navigate carefully rather than relying on other runners.

04 / MAKE ROOM FOR TRAINING

When should your block start?

A 24-week preparation period for 12 June 2027 begins on 26 December 2026; a 20-week period begins on 23 January 2027. Those dates help organise the diary, but neither is a substitute for an appropriate endurance base.

Work backwards from the race to place your terrain practice, longer outings, night rehearsal and recovery. If you are stepping up in distance, assess your experience and the organiser's qualification requirements before choosing the block.

A coach can help balance the competing demands and adjust the preparation with you. MaxMile provides an app-led route if that fits the way you want to train.

05 / SORT THE PRACTICAL BITS

Kit and race-weekend planning

Use Centurion's current mandatory-kit list rather than a checklist copied from another ultra. Practise carrying it, check that your lighting setup is familiar and organise your food so you can use it easily.

The event starts at Matterley Bowl and finishes in Eastbourne. Arrange transport with that point-to-point format in mind. Check the current crew, drop-bag and pacing rules with the organiser before asking anyone to support you. Keep private land and race-specific route deviations out of any improvised recce plan.

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

How much climbing is there?

The organiser publishes approximately 3,800 m of ascent. That is a rounded event figure, not a precise GPX analysis or an equivalent descent total.

Should I hike in training?

Yes, purposeful uphill hiking is worth practising for this rolling course. Rehearse the transition between running and hiking so it is a planned pacing tool rather than an unfamiliar last resort.

Does the race go over Seven Sisters?

The current course notes direct runners via Jevington after Alfriston, not the Seven Sisters coastal route. Use the official route instructions and file, not a generic South Downs Way map alone.

Can I recce the start?

Centurion says not to recce the private Matterley Estate opening section. Plan any other recce using current access and route information.

Do I need a coach to prepare?

You can choose the support that suits you. A coach offers individual discussion and judgement; MaxMile is the app-led option. Whichever route you choose, assess your experience and practise the practical demands as well as the running.

Sources and checks

Fact-checked 20 October 2026

Race details checked on 20 October 2026 against Centurion’s 2027 event page and course notes. The published ascent is approximate; no independent GPX analysis was performed.

This is an independent training guide. Use Centurion’s final instructions for the route, mandatory kit, checkpoint cut-offs and support rules. Do not recce the private Matterley Estate opening section. Adapt training advice to your experience and current running.