Date
Sat, 4 Sept 2027
Start
06:00
Venue
Cae Llan/Village Green, Station Road, Betws-y-Coed, Wales LL24 0AE
Betws-y-coed, Conwy
Countdown
September
The 100 is the full commitment: 164 km out of Betws-y-Coed, a night on the hill and a self-navigated route that rewards patience as much as legs.
Key facts
01Must have finished an organised 50-mile ultra before race day
02Self-navigation with map and compass, no marked course to follow
0342-hour cut-off, with overnight running
Create a free training plan for the Yr Wyddfa Snowdon Ultra 50 & 100 Mile 164 km
7-day free trial, no card required
The course
The route
Betws-y-coed
Distance164km
Total climb5,172m
StartElevation
0 kmDrag map to rotate144.7 km
Weather
Early-September, Betws-y-coed
17°CTypical high
11°CTypical low
5°CColdest in 20 years
61%Days with rain
Highs around 17°C and lows around 11°C, but it has dropped to 5°C. Rain on 61% of days.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the Yr Wyddfa Snowdon Ultra 50 & 100 Mile 164 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Yr Wyddfa Snowdon Ultra 50 & 100 Mile 164 km plan targets
Typical sessions
164 km with 5,172 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Hill reps and vert to prepare the climbs and descents
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Yr Wyddfa Snowdon Ultra 50 & 100 Mile 164 km plan.
7-day free trial, no card required.
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