Races/United Kingdom
Training plan for the Eryri by UTMB 100K
Saturday, 15 May 2027 in Llanberis, United Kingdom. That is 25 weeks away.
When a build would have to start
OLTRA plans a block of a length that suits the distance, then works backwards from race day. For this one:
50K — a 20-week build, 5 runs a week
Starts the week of 21 December 2026 — 5 weeks in hand.
100K — a 24-week build, 6 runs a week
Starts the week of 23 November 2026 — 1 week in hand.
On the day
Distances: 50K, 100K. Entries, course and timings are eryri.utmb.world’s. They decide when entries open and close, and whether the race runs at all — OLTRA sells nothing here and takes nothing from them.
The date here is the one the organiser published, rechecked every 1 hour against the list. Confirm it on their site before you enter.