How far is the Northumbrian Trail Runs?

The Northumbrian Trail Runs offers 2 distances: 50K Ultra Trail Run (31.1 miles), 28K Trail Run (17.4 miles).

How much climbing is in the Northumbrian Trail Runs?

The 50K Ultra Trail Run has 700 m of ascent. The 28K Trail Run has 400 m of ascent.

What are the cut-offs for the Northumbrian Trail Runs?

Overall time limits — 50K Ultra Trail Run: 10h.

When is the next Northumbrian Trail Runs?

Sat, 26 Jun 2027, 08:45. Not open yet.

Events of the North The Northumbrian Trail Runs

Kielder Waterside, Kielder Water & Forest ParkSat, 26 Jun 2027

28K and 50K UTMB Index trail runs from Kielder Waterside

Distance	Ascent	Per km
50K Ultra Trail Run	700 m	15 m
28K Trail Run	400 m	15 m

forestreservoir

Nobody has reviewed this one yet

No reviews of the Northumbrian Trail Runs, 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

10h cut-off, which needs 12:00/km

starts 08:45

What you’re in for

Two trail runs held on the Saturday of The Northumbrian triathlon weekend at Kielder. From Kielder Waterside the route makes a 25km loop that uses newer trails including the Lonesome Pine trail, then picks up the triathlon run course; the 50K adds two laps of Bull Crag that pass back through the event village before finishing beside the lake. Both carry UTMB Index points and are run under Trail Running Association licence. There is a mandatory kit list (head torch, taped waterproof, survival bag, phone, water) and age minimums of 18 for the 28K and 20 for the 50K. Actual distances are about 27.6km and 48km. The 50K has a 10-hour limit with checkpoint cut-offs at 20km and 30km.

Partner · affiliate policy

Train for it: routes near the start

Routes starting within 20 km of Kielder Waterside, Kielder Water & Forest Park, nearest first. Each one has a free GPX file and a TRP grade, so you can rehearse the ground before race day.

VERY HARD

Kielder Water Lakeside Loop

40.0km · 337m climb · Loop · 4.7km away

It's one of the few places in the country where you can run 40km without a single significant hill, entirely on good surface, through forest that feels genuinely remote from anywhere else in England.

All Northumberland routes →

How to enter

Sat, 26 Jun 2027 · Not open yet · £35–£60

See the event on njuko ↗

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

Add to your calendar · with the start time

Common questions

: The Northumbrian Trail Runs offers 2 distances: 50K Ultra Trail Run (31.1 miles), 28K Trail Run (17.4 miles).
: The 50K Ultra Trail Run has 700 m of ascent. The 28K Trail Run has 400 m of ascent.
: Not graded yet. A TRP grade is worked out from distance and climb measured off the course file, and there isn't one for the Northumbrian Trail Runs yet.
: We haven't confirmed the marking on the Northumbrian Trail Runs with Events of the North. Check their race information before you enter rather than assuming it either way.
: We don't hold a compulsory kit list for the Northumbrian Trail Runs. Events of the North confirm mandatory kit in their race information, usually in the final instructions.
: Overall time limits — 50K Ultra Trail Run: 10h.
: We don't hold a checkpoint list for the Northumbrian Trail Runs. What's on the table varies a lot between races, so check the Events of the North race information rather than turning up expecting food.
: Not yet — we don't hold a course file for the Northumbrian Trail Runs. Some organisers only send the GPX to entrants. If we get one, it goes up free, with no sign-up.
: Sat, 26 Jun 2027, 08:45. Not open yet.