Entry through the organiser
Entry details on the organiser’s site →
The organiser, a third party. We take no entries and have no part in the race.
Running Llanberis? Do your long runs with the gel you will race on. Get them on Amazon Amazon partner link
Back to your race planner
Eryri by UTMB
At a glance
- Race day
- The 2027 race
- Start
- 14:002:00 PM
- Distance
- 163.0 km101.3 mi
- 163 km
- Time limit
- 48 hours
The course
The 100M starts and ends in Llanberis at the foot of Yr Wyddfa (Snowdon) and covers 163 km with 9,200 m of elevation gain, past Llyn Gwynant and Llyn Idwal.
- A 163 km grand tour of Eryri from Llanberis163 km and 9,200 m of gain, starting and ending in Llanberis.
- Five distances over a May weekend, renamed for 2027100M, 100K, 80K, 50K and 25K, 14 to 16 May 2027.
Course notes 2 short reads on the course
Whole courseLandmarkA 163 km grand tour of Eryri from Llanberis163 km and 9,200 m of gain, starting and ending in Llanberis.
The organiser describes technical trails, exposed mountain ridges, rocky scree, boulder-strewn paths and boggy moorland. The route passes through Capel Curig, Dolwyddelan, Blaenau Ffestiniog, Croesor, Beddgelert, Rhyd Ddu and Betws Garmon, and the limit is 48 hours.
Sourced
Whole courseCrowdFive distances over a May weekend, renamed for 2027100M, 100K, 80K, 50K and 25K, 14 to 16 May 2027.
The organiser renamed the event after Snowdonia National Park reverted to its Welsh name, Eryri, in 2022. Climbing is 9,200 m for the 100M, 5,800 m for the 100K. The course for the 100M and 100K closes on Sunday 16 May at 14:00.
Sourced
Race weekend
Friday 14 May Race day
-
08:008:00 AM–13:001:00 PM
Eryri 100M race bib collection Llanberis -
08:008:00 AM–13:001:00 PM
Eryri 100K and 80K race bib collection Llanberis. Open 08:00 to 13:00 and again 14:30 to 16:00. -
14:002:00 PM
Eryri 100M race start Llanberis -
Time not published
Overall time limit Maximum allowed race time for the Eryri 100M is 48 hours. 48:00 limit: 17:40/km for 163 km48:00 limit: 28:26/mi for 101.3 mi
Other races (2)
-
18:306:30 PM–19:007:00 PM
Eryri 80K shuttle service Llanberis. Shuttle from Llanberis to the Eryri 80K start in Caernarfon. -
20:008:00 PM
Eryri 80K race start Caernarfon
Saturday 15 May The day after
-
13:301:30 PM
Fastest Eryri 100M finisher expected Llanberis. The organiser's ETA for the fastest finisher. -
15:303:30 PM
Fastest Eryri 100K finisher expected Llanberis. The organiser's ETA for the fastest finisher.
Other races (4)
-
05:305:30 AM
Eryri 100K race start Llanberis -
08:308:30 AM
Eryri 50K race start Llanberis. Three waves, at 08:30, 08:45 and 09:00. -
17:005:00 PM
Eryri 80K and 50K prize-giving ceremony Llanberis -
23:0011:00 PM
Eryri 50K course close Llanberis
Sunday 16 May 2 days after
-
08:008:00 AM
Eryri 25K race start Llanberis. Three waves, at 08:00, 08:15 and 08:30. -
14:002:00 PM
Eryri 100M and 100K course close Llanberis -
14:302:30 PM
Eryri 100M, 100K and 25K prize-giving ceremony Llanberis -
15:003:00 PM
Eryri 100M and 100K drop-bag collection close Llanberis
Times as published by the organiser, in Llanberis time, checked . Confirm on their site before you travel.
The forecast for Friday
Race morning, on the record
Add to calendar .ics file, times in Llanberis time
Entry
Race fuel
Energy gel
Gels for Llanberis, between the aid stations
Over 100 km a gel every 40 minutes stops being a plan: most runners eat real food at the aid stations and take gels between. Practise what you will eat on your longest runs.
Our pick: SiS BETA Fuel gel, box of 6, strawberry and lime. 40 g of carbohydrate a gel, about twice a usual gel, from two kinds of sugar your body takes up side by side. Enough for race day and two test long runs.
Easy to forget on race morning: pack them with your bib the night before.
Get it on Amazon
We earn a small fee if you buy through these links. The price is the same.
In Canada the button opens GU Energy Gel, Salted Caramel, 24-pack, the best seller there.
Outside the Netherlands, Belgium, Germany, Austria and Switzerland, the UK and Ireland, Spain and Portugal, Italy, the rest of the EU and Canada the button opens GU Energy Gel, Chocolate Outrage, 24-pack on Amazon.com, the best seller there.
Anti-chafe
Compeed anti-blister stick, 8 ml
An invisible layer before the start keeps seams, straps and shoes from rubbing skin raw.
Put it on before you leave for the start: heels and toes, inner thighs, under a bra or heart-rate strap.
Try it on a long run first, like everything you use on race day.
Get it on Amazon
We earn a small fee if you buy through these links. The price is the same.
Number belt
Compressport Race Belt
Holds your bib without safety pins through your top, with loops for up to 8 gels.
Clip the bib on the night before, so it goes on with your shorts in the morning.
Keep the number on the front, where officials and photographers can see it.
Get it on Amazon
We earn a small fee if you buy through these links. The price is the same.
Electrolytes
SiS Hydro electrolyte tablets, tube of 20
One tablet in a bottle puts back some of the salt you sweat out.
One tablet in 500 ml of water in the hour before the start.
Only if you have used them in training: nothing new on race day.
Get it on Amazon
We earn a small fee if you buy through these links. The price is the same.
Blister plasters
Compeed blister plasters, medium, 6
One in a pocket cushions a blister if one starts.
Put it on clean, dry skin and leave it until it comes off by itself.
Give a couple to whoever comes to cheer, so they are there at the km you need them.
Get it on Amazon
We earn a small fee if you buy through these links. The price is the same.
Questions about the Eryri by UTMB
- When is the Eryri by UTMB 2027?
- Friday 14 May 2027. The start is at 14:00.
- What is the time limit at the Eryri by UTMB?
- Runners have 48 hours to finish.
- Where does the Eryri by UTMB start?
- Start: Llanberis.
Keep exploring
More races to look at after the Eryri by UTMB.
