Photo: © Run 4 Wales / Cardiff Half Marathon▶Cardiff Half Marathon
Cardiff, United Kingdomsince 2003At a glance
Cardiff Half Marathon 2027 takes place on 3 October 2027 in Cardiff, United Kingdom. Distances: 21.098 km. Start at 10:00 from Castle Street, davanti al Cardiff Castle.
- Date
- Sunday, 3 October 2027
- Location
- Cardiff, United Kingdom
- Start
- Castle Street, davanti al Cardiff Castle
- Finish
- Civic Centre
- Distances
- Half marathon · 21.098 km · Competitive
- Start times
- 10:00
- Registration
- Registration closed on 18 October 2026
- Organiser
- Run 4 Wales ↗
- Official website
- cardiffhalfmarathon.co.uk ↗
- Edition
- since 2003
- Series
- SuperHalfs · World Athletics Elite Label
Last updated: 19 October 2026
The race
The Cardiff Half Marathon is one of Europe's largest half marathons and Wales' biggest mass-participation event, with more than 29,000 registered runners alongside elite men's, women's and wheelchair races. Founded by Barnardo's in 2003 with 1,500 runners, it hosted the World Half Marathon Championships in 2016 and the Commonwealth Half Marathon Championships in 2018, stages the Welsh championships every year and holds a World Athletics Elite Road Race Label.
It is the SuperHalfs race in the UK and raises more than £3 million for charity every year. The 2027 race is on Sunday 3 October on a flat, fast course that starts outside Cardiff Castle and finishes at the Civic Centre, taking in the Principality Stadium, Penarth, Cardiff Bay and Roath Park Lake. The start is at 10:00 on Castle Street, with a 4-hour time limit.
Places are allocated by ballot (UK £59, international £70), which closes on 18 October 2026. On Saturday the Cardiff Half Junior offers family races.
Videos
Course
The race starts on Castle Street, outside Cardiff Castle, and heads past the Principality Stadium and Cardiff City Stadium on the way to Penarth, where runners pass the marina. It then crosses the Cardiff Bay Barrage into the heart of Cardiff Bay, with the Norwegian Church, the Senedd and the Wales Millennium Centre. The course then heads north, loops Roath Park Lake and finishes with a grandstand finish at the Civic Centre in the city centre.
It is predominantly flat and fast, and has been measured by an AUKCM Grade 1 / IAAF / AIMS Grade B course measurer. There are water, sports drink and gel stations along the route, with toilets at every drink station and within the first mile. The Strava route is an estimated representation of the course.
Entry fees
- Until 18 October 2026Sorteggio per residenti nel Regno Unito (1-18 ottobre 2026, esito il 22 ottobre); la quota si paga solo se si viene estratti. Più la commissione non rimborsabile di Let's Do This.£59
- Until 18 October 2026Sorteggio internazionale, anche in squadra (1-18 ottobre 2026, esito il 22 ottobre). Più la commissione non rimborsabile di Let's Do This.£70
What's included
- Race pack
- Technical shirt
- Finisher medal
- Chip timing
- Cronometraggio
- Aid stations
- Pacers
- Bag drop
- Massages
Rules and requirements
The half is open to runners aged 17 or over on race day. For 2027 places are allocated through a free ballot (1-18 October 2026, results on 22 October): UK ballot £59 and international ballot £70, with a team option; the fee is only charged to successful entrants, plus a non-refundable Let's Do This admin fee. Skip-the-ballot entries (NSPCC, multi-event bundles, Welsh Athletics) are sold out; charity, tour operator and SuperVoucher entries open on 22 October 2026.
Starts on Castle Street at 10:00 (white, green, red and pink bibs; pens open at 9:15) and 10:10 (blue, purple and yellow), with the elite wheelchair race at 9:57; runners can only move back a pen. 4-hour time limit: runners falling behind are collected by a sweep vehicle or continue on the pavement outside the event. The chip bib must be worn on the front with emergency details filled in on the back; swapping bibs leads to bans from future events.
No refunds: you can only gift your place through the official service before the deadline. Anyone caught urinating outside the toilets is banned from all future events.
