How far is the Beast of the Blacks?

The Beast of the Blacks offers 3 distances: 10 Mile (16.1 km), 20 Mile (32.2 km), 40 Mile (64.4 km).

How much climbing is in the Beast of the Blacks?

The 10 Mile has 468 m of ascent. The 20 Mile has 1,360 m of ascent. The 40 Mile has 2,720 m of ascent.

Is the Beast of the Blacks course marked?

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

What are the cut-offs for the Beast of the Blacks?

Overall time limits — 10 Mile: 5h, 20 Mile: 8h, 40 Mile: 16h.

Limitless Trails Beast of the Blacks

Crickhowell, PowysSat, 6 Mar 2027

Ten, twenty or forty miles over the Black Mountains from Crickhowell, with over two and a half thousand metres of climb on the long one.

Distance	Ascent	Per km
40 Mile	2,720 m	42 m
20 Mile	1,360 m	42 m
10 Mile	468 m	28 m

mountainmoorMarked course

Nobody has reviewed this one yet

No reviews of the Beast of the Blacks, 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

5h cut-off, which needs 18:38/km

Start time not confirmed yet — check with the organiser.

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How to enter

Sat, 6 Mar 2027 · Entries open

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Common questions

: The Beast of the Blacks offers 3 distances: 10 Mile (16.1 km), 20 Mile (32.2 km), 40 Mile (64.4 km).
: The 10 Mile has 468 m of ascent. The 20 Mile has 1,360 m of ascent. The 40 Mile has 2,720 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 Beast of the Blacks yet.
: Yes, the course is marked. Navigation skills are not required.
: We don't hold a compulsory kit list for the Beast of the Blacks. Limitless Trails confirm mandatory kit in their race information, usually in the final instructions.
: Overall time limits — 10 Mile: 5h, 20 Mile: 8h, 40 Mile: 16h.
: We don't hold a checkpoint list for the Beast of the Blacks. What's on the table varies a lot between races, so check the Limitless Trails race information rather than turning up expecting food.
: Not yet — we don't hold a course file for the Beast of the Blacks. Some organisers only send the GPX to entrants. If we get one, it goes up free, with no sign-up.
: Sat, 6 Mar 2027. Entries open.