Skip to content

Ultra Challenge Chiltern 50

Henley Basecamp, OxfordshireNo date announced yet

Fifty or twenty-five kilometres of Chiltern loops out of Henley, with a 10K for the day.

DistanceAscentPer km
50km920 m18 m
25km500 m20 m
10K235 m24 m
chalkwoodlandMarked course

Nobody has reviewed this one yet

No reviews of the Chiltern 50, and nothing on what people wore. Both are things no organiser publishes and every runner wants before they enter — how it actually went, and what was on your feet.

Ran it? Write the first review

Running it soon? Connect Strava and we will ask you about it the day you finish, so you do not have to remember to come back.

Pick your distance

What you’re in for

Fifty or twenty-five kilometres of Chiltern loops out of the Henley basecamp, with a 10K for the day. Late September. An Ultra Challenge event, which means walkers, joggers and runners on the same course, signed with pink arrows and glow sticks after dark, with a covered rest stop every twelve kilometres or so — food, drink, medics, toilets — and a bigger one every twenty-five. Runners can enter with a target time; most of the field will be walking.

Terrain and trail

Chalk bridleway, beech woodland and the Thames path around Henley — firm and rolling, with short steep pulls out of the valleys. Signed throughout. A road shoe with tread.

Personalised Race Map Print

Memories Made Outside · our print shop

Turn your Chiltern 50 into a print

Upload your GPX or connect Strava and we'll print the course with your name, date and finish time. From £12.

Make your race print →

More from Ultra Challenge

Every Ultra Challenge race →

Other races Ultra Challenge put on, soonest first.

20

Mar

2027

Ultra Challenge logo

Bath 50

Bath Racecourse, Somerset · Ultra Challenge

Fifty kilometres, twenty-five or ten on the hills around Bath from the racecourse.

10, 29 & 50 kmup to 1,000 m climb

Entries open

17

Apr

2027

Ultra Challenge logo

Windsor 50

Windsor Racecourse, Berkshire · Ultra Challenge

Fifty, twenty-five or ten kilometres of Thames Path and Windsor parkland from the racecourse.

10, 25 & 50 kmup to 320 m climb

Entries open

1

May

2027

Ultra Challenge logo

Isle of Wight Challenge

Chale Basecamp, Isle of Wight · Ultra Challenge

The whole Isle of Wight coastal path in one go, a hundred and six kilometres, or half or a quarter of it.

Cowes 10 Mile, 25 km, Southern 50km, 52km 1st Half, 54km 2nd Half & 106 kmup to 1,800 m climb

Entries open

15

May

2027

Ultra Challenge logo

Jurassic Coast Challenge

Corfe Castle, Dorset · Ultra Challenge

A hundred kilometres of Jurassic Coast from Corfe Castle to Bridport, or fifty-nine or twenty-five of it.

Bridport 10K, Weymouth 10 Mile, 25km 1st Quarter, 34km 2nd Quarter, 42km 2nd Half, 42 km, 59km 1st Half, 76 km & 100 kmup to 2,300 m climb

Entries open

29

May

2027

Ultra Challenge logo

London 2 Brighton Challenge

Richmond upon Thames, London · Ultra Challenge

Capital to coast: a hundred kilometres from Richmond over the North and South Downs to Brighton, the original Ultra Challenge.

25 km, 33km 2nd Quarter, 42 km, 58km 1st Half, 75 km & 100 kmup to 1,500 m climb

Entries open

5

Jun

2027

Ultra Challenge logo

Lake District Challenge

Kendal Basecamp, Cumbria · Ultra Challenge

A hundred kilometres around the southern Lake District from Kendal, or fifty or twenty-five.

Ambleside 10K, 29km 1st Quarter, 42 km, 50km 1st Half, 50km 2nd Half & 100 kmup to 2,500 m climb

Entries open

Other races near here

Chilterns races →

Races from other organisers starting within 30 km of Henley Basecamp, Oxfordshire, nearest first.

How to enter

No date announced for the next running yet. Ultra Challenge’s site ↗ is where it will show up first.

Blacks sale: final clearance

Partner · affiliate policy

Common questions

The Chiltern 50 offers 3 distances: 50km (31.1 miles), 25km (15.5 miles), 10K (6.2 miles).

Past runnings

2026Sat, 26 Sept 2026