Ultra X Dragon's Back Race
Six days down the mountainous spine of Wales, Conwy Castle to Cardiff Castle.
380km
236 miles
16,400 m ascent
43 m per km
Nobody has reviewed this one yet
No reviews of the Dragon's Back Race, 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 reviewRunning 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
What you’re in for
Six days down the mountainous spine of Wales, Conwy Castle to Cardiff Castle: 380km with 16,400m of climb, the Carneddau, Glyderau and Yr Wyddfa on day one, the Rhinogs, Cadair Idris, Plynlimon, the Elan valley and the Beacons on the way south. From 2026 it follows a single mandatory route rather than free navigation, but the organiser still calls it navigationally demanding, and it is unmarked. Camp each night, a daily cut-off, and a finish rate that has historically sat around half the field. There are two-day versions — the Fire from Conwy, the Tail into Cardiff — for people who want a piece of it. September.
Terrain and trail
Everything Welsh mountains do: rock and scrambling on the Carneddau and Glyderau, the boulder and heather of the Rhinogs, which have broken more people than anything else on the route, grassy whaleback ridges in mid-Wales, bog on Plynlimon, forest road and lane in the valleys, and the Beacons' ridges to finish. Full mountain kit carried, and feet are the thing that ends most races. A fell shoe with grip, and two more pairs in the bag.

Memories Made Outside · our print shop
Finished the Dragon’s Back Race? Put it on the wall.
A map print of the Dragon’s Back Race, with your name, date and finish time. From £12.
See the print →Cut-offs
Six stages, with a daily cut-off window of 06:00 to 22:00. Ultra X publish no race-wide time limit.
More from Ultra X
Every Ultra X race →Other races Ultra X put on, soonest first.
3
Apr
2027

Northern Traverse
St Bees, Cumbria · Ultra X
Wainwright's Coast to Coast raced non-stop, St Bees to Robin Hood's Bay.
Event full
17
Apr
2027

Spring Trail Series
Cowdray Estate, West Sussex · Ultra X
The Serpent Trail through the South Downs — five distances, one start line.
Entries open
1
May
2027

Ultra X Scotland
Inverness, Highland · Ultra X
Seven race options on the Loch Ness trails, out of Inverness.
Entries open
24
Jul
2027

Ultra X Wales
Abergavenny, Monmouthshire · Ultra X
A hundred miles down to 12km in the Bannau Brycheiniog.
Entries open
no date
yet

Ultra X England
Edale, Derbyshire · Ultra X
Five distances off the Peak District ridgelines, from Edale.
HARD TO EXPERT
Other races near here
Eryri (Snowdonia) races →Races from other organisers starting within 30 km of Conwy, Conwy, nearest first.
24
Jul
2027

Ogwen | Yr Helgi Du
Plas y Brenin, Capel Curig, Conwy · Always Aim High Events · 13 miles away
Fifteen, twenty-five or forty kilometres over the Glyderau and Carneddau from Plas y Brenin, with Grade 1 scrambling on the longest.
VERY HARD TO EXPERT
Entries open
12
Jun
2027

Pilgrims Trail 60
Bangor Cathedral · Black Sheep Events · 13 miles away
Sixty pilgrim miles of the North Wales Pilgrims Way from Bangor Cathedral to Aberdaron inside twenty-four hours, with a tracker, seven checkpoints and the waymarkers to follow.
Entries open
£109–£119
10
Jul
2027

Snowdonia Trail Marathon Eryri
Llanberis, Gwynedd · Always Aim High Events · 17 miles away
Ten kilometres to fifty-six from Llanberis, under Yr Wyddfa, with the marathon and ultra both ITRA and UTMB indexed.
HARD TO VERY HARD
Entries open
How to enter
No date announced for the next running yet. Ultra X’s site ↗ is where it will show up first.
Common questions
- The Dragon's Back Race is one distance: 380km (236.1 miles).