Date
Sun, 11 Jul 2027
Start
05:00
Venue
Llanberis Event Village/Event Field, beside the Community Centre, Llanberis, LL55 4UR
Llanberis, Gwynedd
Countdown
July
The big one: 57 km and 2,300 m of climbing, starting at 5am from Llanberis. A serious ultra that will fill most of your day.
Key facts
01Minimum age 20
02Mandatory mountain-safety kit
03Staged cut-offs, with an 11h30 finish cut-off
Create a free training plan for the Snowdonia Trail Marathon Eryri 57 km
7-day free trial, no card required
The course
The route
Llanberis
Distance57km
Total climb2,300m
StartElevation
0 kmDrag map to rotate53.3 km
Weather
Mid-July, Llanberis
17°CTypical high
14°CTypical low
11°CColdest in 20 years
55%Days with rain
Highs around 17°C and lows around 14°C, but it has dropped to 11°C. Rain on 55% 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 Snowdonia Trail Marathon Eryri 57 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 Snowdonia Trail Marathon Eryri 57 km plan targets
Typical sessions
57 km with 2,300 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 Snowdonia Trail Marathon Eryri 57 km plan.
7-day free trial, no card required.
Other races at Snowdonia Trail Marathon Eryri
More events in July in United Kingdom
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