Marathon Eryri
The UK's Toughest and Most Spectacular Marathon.
Race day
24
Oct 2026
The UK's Toughest and Most Spectacular Marathon.
Provenance ledger
Every fact, and where it came from
| Field | Value | Source | Updated |
|---|---|---|---|
| Date | Saturday 24 October 2026Curated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Start time | 10:30 local (Europe/London)Curated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Distances | Full MarathonCurated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Location | Llanberis, Wales, United KingdomCurated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Start area | Llanberis, Caernarfon, Gwynedd LL55 4SUConfirm the exact start with the organizerCurated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Entry price | £48–£55Curated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Course | Mixed · Loop · UK Athletics certifiedCurated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Elevation gain | 800 mCurated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Field size | About 2,300 runners (typical field)Curated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Organizer | Snowdonia Marathon CyfCurated listing · 21 May 2026 | Curated listing | 21 May 2026 |
| Official website | marathoneryri.comOrganizer · 21 May 2026 | Organizer | 21 May 2026 |
| Listing | Verified listingSunday Marathon review · 21 May 2026 | Sunday Marathon review | 21 May 2026 |
Source is where this listing’s facts came from. Where a field could not be confirmed we leave it blank rather than guess.
Report a correctionAbout this race
The UK's toughest marathon encircling Yr Wyddfa (Snowdon) through the heart of Eryri (Snowdonia).
Is this race a fit?
These notes are generated from listed Sunday Marathon race facts. They are meant for shortlisting and planning, not as a replacement for official organizer instructions.
Best For
Runners comparing mixed race options
Marathon Eryri belongs on the shortlist when you are comparing Full Marathon options around Llanberis, Wales, United Kingdom and want the key date, location, registration, and course facts in one place.
Watch For
Confirm entry details before paying
A registration path is listed; review entry rules, refund terms, and transfer policies before paying.
Decision Signal
Performance claims need source checks
Marathon Eryri should be evaluated as a full race-weekend choice in Llanberis, Wales, United Kingdom, not only as a date on a calendar. Start with mixed surface, loop course, certified course, 800 m elevation gain listed. Weather notes are listed, so factor them into gear and pacing decisions.
- Date And Schedule
Marathon Eryri is currently listed for October 24, 2026, which makes the October planning window important for training and travel. Recheck official timing before race week.
- Location Base
Plan around Llanberis, Wales, United Kingdom, then verify the exact start area, finish area, packet pickup, and post-race exit route before booking non-refundable travel.
- Course Fit
Listed course signals include mixed surface, loop course, certified course, 800 m elevation gain listed. Use them to compare effort, pacing risk, and training fit before relying on the race for a specific goal.
- Entry Readiness
A registration path is listed; review entry rules, refund terms, and transfer policies before paying.
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