Races Half marathon · Anglesey, UK
Anglesey Half Marathon
Anglesey Half Marathon is a rolling half marathon in Anglesey, UK, held each May. A closed-road course from the Mona showground that heads west on the A5, uses country lanes through Trefor and Bodffordd, then curves south past Llyn Cefni. The organiser describes gentle undulations. Late May on Anglesey is usually mild and can be windy, with temperatures of 8 to 16°C. With Anglesey Half Marathon's constant undulation, pace by effort rather than the watch: even effort beats even splits here.
Page rebuilt 2026-11-14 · race facts not independently verified — confirm dates and entries on the official race site
When
May
next: Sunday 23 May 2027
Course
rolling
Half marathon
Conditions
Late May on Anglesey is usually mild and can be windy, with temperatures of 8 to 16°C.
Racing this course well
A closed-road course from the Mona showground that heads west on the A5, uses country lanes through Trefor and Bodffordd, then curves south past Llyn Cefni. The organiser describes gentle undulations.
With Anglesey Half Marathon's constant undulation, pace by effort rather than the watch: even effort beats even splits here.
Getting a place
- How you get in
- Open entry: first come, first served
- Price
- Four price tiers rising to £55.99 in race week (£53.99 for UK Athletics affiliated runners) (2027 race)
Official Anglesey Half Marathon site →Checked November 2026
Race day
- Next race
- Sunday 23 May 2027
- Time limit
- 3.5 hours
- Also on the day
- 10k
The course in numbers
The out leg follows the A5 west, then the route turns onto quieter country lanes and arcs south by Llyn Cefni before rejoining the A5 for the return to the showground.
- Layout
- Loop
- Surface
- Closed roads, mainly the A5 and country lanes
Worth knowing
- Both the half marathon and the 10k now run on fully closed roads.
- The 2027 event hosts the Welsh Athletics Masters Championship.
- The organiser says it does not currently provide pace groups.
Pick your goal for Anglesey
Pace charts, weekly structure and timelines for the most common half marathon goals:
The date shown is the one the organiser has announced. Change it if yours differs.
Build your training around Anglesey Half Marathon.
RunV works backwards from race day to today. Your plan adapts when life interrupts, and you approve every change. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Anglesey Half Marathon?
- The next Anglesey Half Marathon is on Sunday 23 May 2027 in Anglesey, UK. It is held each May.
- Is the Anglesey Half Marathon course flat?
- A closed-road course from the Mona showground that heads west on the A5, uses country lanes through Trefor and Bodffordd, then curves south past Llyn Cefni. The organiser describes gentle undulations.
- How do I enter the Anglesey Half Marathon?
- Open entry: first come, first served. Price: Four price tiers rising to £55.99 in race week (£53.99 for UK Athletics affiliated runners) (2027 race).
- How should I train for the Anglesey Half Marathon?
- Train specifically for Anglesey — terrain, conditions, goal pace — and let the plan flex around real life. With RunV Premium you can adapt your plan to fit your week.
Not sure what to target? Predict your half marathon time from a recent race →
More half marathon races
Supplements research for this distance
Build for Anglesey — around your actual life
RunV engineers your block backwards from race day in May — and adapts it when training doesn't go to script. You approve every change.
