How far is the North Chilterns 50K?

The North Chilterns 50K is one distance: 50K (31.1 miles).

How hard is the North Chilterns 50K?

50K: Very Hard. TRP grades come from distance and climb measured off the course file, not from the organiser.

Is the North Chilterns 50K course marked?

Yes, the course is marked. Navigation skills are not required.

What are the cut-offs for the North Chilterns 50K?

Overall time limits — 50K: 8h 45m.

When is the next North Chilterns 50K?

Sat, 21 Nov 2026, 08:15. Entries open.

Runaway Racing North Chilterns 50K

Offley, HertfordshireSat, 21 Nov 2026

Fifty kilometres through the northern Chilterns in November, starting near Offley.

50K

31 miles

646 m ascent

13 m per km

8h 45m cut-off

10:30/km to make it

chalkwoodlandMarked course

Nobody has reviewed this one yet

No reviews of the North Chilterns 50K, 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.

The course

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VERY HARD

TRP grade · E4·T2

8h 45m cut-off, which needs 10:30/km

Partner · affiliate policy

How to enter

Sat, 21 Nov 2026 · Entries open

Enter on their website ↗

Entries are handled by Runaway Racing, not by us. We take nothing for sending you there.

Add to your calendar · with the start time

Common questions

: The North Chilterns 50K is one distance: 50K (31.1 miles).
: The 50K has 646 m of ascent.
: 50K: Very Hard. TRP grades come from distance and climb measured off the course file, not from the organiser.
: Yes, the course is marked. Navigation skills are not required.
: We don't hold a compulsory kit list for the North Chilterns 50K. Runaway Racing confirm mandatory kit in their race information, usually in the final instructions.
: Overall time limits — 50K: 8h 45m.
: We don't hold a checkpoint list for the North Chilterns 50K. What's on the table varies a lot between races, so check the Runaway Racing race information rather than turning up expecting food.
: Not yet — we don't hold a course file for the North Chilterns 50K. Some organisers only send the GPX to entrants. If we get one, it goes up free, with no sign-up.
: Sat, 21 Nov 2026, 08:15. Entries open.