GB Ultras Snowdon Ultra 50
Forty-five mountain miles from Betws-y-Coed.
45 Mile
72 km
3,106 m ascent
43 m per km
20h cut-off
16:34/km to make it
Nobody has reviewed this one yet
No reviews of the Snowdon Ultra 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 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
EXPERT
TRP grade · E5·T3
20h cut-off, which needs 16:34/km
7 checkpoints
This file is from a previous running and the course may have changed since. If you are navigating with it, get the current version from GB Ultras first.
What you’re in for
Forty-five miles from Betws-y-Coed on the Snowdonia Slate Trail past Swallow Falls, then up into the mountains: the flank of Tryfan, Yr Wyddfa, Glyder Fach and Glyder Fawr, the Devil's Kitchen and Llyn Idwal, coming back by Llyn Crafnant and Llyn Geirionydd. Hardcopy OS OL17 or a Harvey XT25 or XT40 is mandatory, with a base plate compass, and GB Ultras are explicit that you should be a competent map reader and not lean on GPS in poor visibility or the dark. Five checkpoints, 3,254 m of ascent.

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Train for it: routes near the start
Routes starting within 20 km of Betws-y-Coed, Conwy, nearest first. Each one has a free GPX file and a TRP grade, so you can rehearse the ground before race day.
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Eryri (Snowdonia) races →Races from other organisers starting within 30 km of Betws-y-Coed, Conwy, nearest first.
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How to enter
No date announced for the next running yet. GB Ultras’s site ↗ is where it will show up first.
Common questions
- The Snowdon Ultra 50 is one distance: 45 Mile (72.4 km).