There are 42 upcoming 5k races in Wales listed. Next up: Abergele 5K & 10K (Sunday, 18 October 2026), RTT Gower Trail Half Marathon & 10K (Sunday, 18 October 2026), Colour Run Spooky (Saturday, 24 October 2026).
Upcoming races only, soonest first. Confirm dates and entry details with the organiser.
Pensarn · Abergele Pensarn North Wales
Flat coastal races starting on the Abergele/Pensarn promenade. Enter the 5K, the 10K or both distances on the same day. Check the separate start times before booking the double.
£26–£48
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Oxwich · Oxwich Bay, Swansea, Wales, SA3 1LS
Coastal trail events from Oxwich Bay on the Gower Peninsula. The half marathon requires self-navigation; the 5K and 10K routes are marked. Starts and registration closing times differ by distance.
£21.99–£41.99
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Burry Port · Pembrey Country Park, Pembrey, Burry Port, SA16 0EJ
A non-competitive Halloween 5K in Pembrey Country Park. Participants can walk, jog or run through colour-powder stations. Standard and VIP packages are available.
£24.99
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Pontypridd · Bike Doctor, Pontypridd, CF37 2PE, United Kingdom
Phoenix South Wales - Zombie Run is organised by Phoenix Running South Wales in Pontypridd. Entry options: 7 Hour Timed Challenge Including 5km, 10km, Half Marathon, Marathon, Ultra; NO MEDAL - 7 Hour Timed Event Including 5km, 10km, Half Marathon, Marathon, Ultra.
£22–£35
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Cardiff · North Road, Cardiff CF10 3DX, UK
The Cardiff 1.5k, 5k, 10k & Half Marathon MoRun is organised by The Fix Events UK in Cardiff. Entry options: 5k MoRun; 10k MoRun; Half Marathon. The course surface has not been confirmed.
£30–£35
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Cardiff · Harbour Drive, Cardiff, CF10 4, United Kingdom
Phoenix South Wales - Lest We Forget 2026 is organised by Phoenix Running South Wales in Cardiff. Entry options: 7 Hour Timed Event Including 5km, 10km, Half Marathon, Marathon, Ultra.
£35
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Aberdare · Dare Valley Country Park, Aberdare, CF44 7PS
Timed running challenge at Dare Valley Country Park, with distances from 3 km to ultra. Runners and walkers are welcome; age-based distance limits apply.
£18–£34
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Treharris · Taff Bargoed Angling Association, Treharris, CF46 6RD, United Kingdom
Phoenix South Wales - Cheeky Fox is organised by Phoenix Running South Wales in Treharris. Entry options: 7 Hour Timed event including 5km, 10km, Half Marathon, Marathon, Ultra.
£35
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Pwllheli · WEST END PARADE
CURO'R COBLYN, PWLLHELI 5KM & 5M takes place in Pwllheli on 29 November 2026. Check the organiser’s page for the route, start arrangements and eligibility.
£15.90–£21.20
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Merthyr Tydfil · CF48 1UT, Merthyr Tydfil, United Kingdom
Phoenix South Wales - Christmas Advent Run is organised by Phoenix Running South Wales in Merthyr Tydfil. Entry options: 7 Hour Timed Event Including 5km, 10km, Half Marathon, Marathon, Ultra.
£35
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Pontrhydyfen · Bryn Bettws Lodge, Pontrhydyfen, Port Talbot SA12 9SP
RTT Afan Forest Trail 10k & 5K takes place in Pontrhydyfen on 29 November 2026. Organised by Aspire X Events. Published venue: Bryn Bettws Lodge, Pontrhydyfen, Port Talbot SA12 9SP. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£26.99–£31.99
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Gwersyllt
Alyn Waters Winter Trails - 5k & 10k takes place in Gwersyllt on 05 December 2026. Organised by Out Fit. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£19–£21.50
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Llandudno · The Pier
Llandudno 5K Santa Dash takes place in Llandudno on 05 December 2026. Check the organiser’s page for the route, start arrangements and eligibility.
£13.65–£17.85
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Mumbles · Oyster Wharf, Mumbles Road, Swansea, SA3 4DN
The Great Christmas Fun Run takes place in Mumbles on 06 December 2026. Organised by Aspire X Events. Published venue: Oyster Wharf, Mumbles Road, Swansea, SA3 4DN. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£21.99–£27.99
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Aberavon · Aberavon Beach Front
Run4All Neath Santa Run takes place in Aberavon on 12 December 2026. Organised by Run4All Neath. Published venue: Aberavon Beach Front. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£17
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Llanelli · Treath Ffordd, Sandpiper Rd, Llanelli, Wales SA15 4AX
A 5km charity Santa fun run from T1 Cafe Lounge in Llanelli. Registration is advertised between 10:00 and 10:45, with the run at 11:00.
£14.95
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Aberdare · Dare Valley Country Park, Aberdare, CF44 7PS
Santa Run Wales is organised by Saturn Running in Aberdare. Entry options: 2.5km - 1 Lap; 5km - 2 laps.
£12.94
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Pontardawe
Running / Walking organised by Clwb Rhedeg Pontardawe Running Club in Pontardawe. Minimum age: 18 or older. Online entry deadline: Friday 18th December 2026. Published meeting-location reference: ///lines.swordfish.response.
£8–£10
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Nantgaredig · Nantgaredig RFC, B4310, Nantgaredig, SA32 7LQ
A festive 5km jog from Nantgaredig Rugby Club along the new path, supporting Tenovus Cancer Care. Race numbers are collected from 09:00. Children under 13 enter free.
Price not confirmed
Aberdare · Dare Valley Country Park, Aberdare, CF44 7PS
The Snow Globe Gallop Bobble Hat Run - Wales takes place in Aberdare on 20 December 2026. Organised by Saturn Running. Published venue: Dare Valley Country Park, Aberdare, CF44 7PS. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£18–£39
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Pontypridd · Connected Kerb, Gyfeillon Road, Pontypridd, CF37 2PP, United Kingdom
Phoenix South Wales - Frozen Phoenix 2026 is organised by Phoenix Running South Wales in Pontypridd. Entry options: 7 Hour Timed event including 5km, 10km, Half Marathon, Marathon, Ultra.
£35
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Llanbenwch
Vale of Clwyd 5k takes place in Llanbenwch on 10 January 2027. Organised by Out Fit. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£19
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Chepstow · Chepstow Racecourse, Chepstow, Monmouthshire, NP16 6EH
Races at Chepstow Racecourse on a mixture of tarmac and trail, starting and finishing in front of the grandstand.
£29.40–£35.70
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Aberdare · Dare Valley Country Park, Aberdare, CF44 7PS
The Milkshake Meander - Wales takes place in Aberdare on 24 January 2027. Organised by Saturn Running. Published venue: Dare Valley Country Park, Aberdare, CF44 7PS. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£18–£35
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Cardiff · Bute Park, North Road, Cardiff, UK
The Cardiff 5k, 10k and Half Marathon Winter Warmer Run is organised by The Fix Events UK in Cardiff. Entry options: 5 km; 10 km; Half Marathon. The course surface has not been confirmed.
£25–£30
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Caerphilly · 31 Coed Main, Caerphilly, CF83 1RS, United Kingdom
Caerphilly Trail 5k and 10k is organised by Ridge Runners in Caerphilly. Entry options: Caerphilly Trail 10k; Caerphilly Trail 5k.
£29–£34
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Aberdare · Dare Valley Country Park, Aberdare, CF44 7PS
Childrens St Davids Day Dragon Run 2027 - Wales takes place in Aberdare on 27 February 2027. Organised by Saturn Running. Published venue: Dare Valley Country Park, Aberdare, CF44 7PS. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£12
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Ruthin · Ruthin Leisure Centre
Ruthin 5K-10K takes place in Ruthin on 28 February 2027. Check the organiser’s page for the route, start arrangements and eligibility.
£19.95–£22.05
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Aberdare · Dare Valley Country Park, Dare, Aberdare, Wales, CF44 7PS
St David's Day Dragon Run 2027 takes place in Aberdare on 28 February 2027. Organised by Saturn Running. Published venue: Dare Valley Country Park, Dare, Aberdare, Wales, CF44 7PS. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£18–£35
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Mold · Loggerheads Country Park
Loggerheads Trail 5k & 10k takes place in Mold on 06 March 2027. Organised by Out Fit. Published venue: Loggerheads Country Park. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£19.50–£23
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Aberdare · Dare Valley Country Park, Aberdare, CF44 7PS
Running 9 to 5 - Wales takes place in Aberdare on 14 March 2027. Organised by Saturn Running. Published venue: Dare Valley Country Park, Aberdare, CF44 7PS. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£18–£35
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Pontypridd · Connected Kerb, Gyfeillon Road, Pontypridd, CF37 2PP, United Kingdom
Phoenix South Wales - Hedgie Hog Jog is organised by Phoenix Running South Wales in Pontypridd. Entry options: 7 Hour Timed event including 5km, 10km, Half Marathon, Marathon, Ultra.
£35
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Carmarthen · Pendine Sands, Carmarthen, UK
The Pendine Sands Races is organised by Every Mile Counts in Carmarthen. Entry options: Half Marathon; 10 km; 5 km. The course surface has not been confirmed.
£30–£40
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Cardiff · Coopers Field - Bute Park, Off North Road, Cathays, CF10 3ER
A 5km obstacle-course fundraising event for Cancer Research UK at Coopers Field - Bute Park in Cardiff. Participants can run, jog or walk at their own pace. The course includes climbing, crawling and sliding obstacles. The organiser asks each participant to aim to raise £50.00. Starts are arranged in waves; choose a time when booking.
£11.24
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Caernarfon · Parc Coed Helen, Parc Coed Helen, LL54 5RR
A 5km fundraising run for Cancer Research UK at Parc Coed Helen in Caernarfon. Participants can run, jog or walk at their own pace. The organiser asks each participant to aim to raise £50.00.
£7.99
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Swansea · Singleton Park, Sketty, SA2 8PY
A 5km obstacle-course fundraising event for Cancer Research UK at Singleton Park in Swansea. Participants can run, jog or walk at their own pace. The course includes climbing, crawling and sliding obstacles. The organiser asks each participant to aim to raise £50.00. Starts are arranged in waves; choose a time when booking.
£11.24
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Margam · Margam Country Park, Wales
MARGAM PARK - WILD TRAIL RUNS 2027 takes place in Margam on 23 May 2027. Organised by Wild Deer Events. Published venue: Margam Country Park, Wales. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£24–£28
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Treharris · B4255, Treharris, CF46 6, United Kingdom
PHOENIX - South Wales - D-Day Military Series Run is organised by Phoenix Running South Wales in Treharris. Entry options: 7 Hour Timed event including 5km, 10km, Half Marathon, Marathon, Ultra; NO MEDAL - 7 hour timed challenge including 5km, 10km, Half Marathon, Marathon, Ultra.
£22–£35
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Cardiff · 149 King George V Dr E, Cardiff CF14 4EN, UK
Inflatable 5K - Cardiff is organised by UK Running Events in Cardiff. Entry options: 5K; 2.5K; 10K; 15K. The course surface has not been confirmed.
£24.50–£51.50
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Caerphilly · Rosita's Cafe & Bar, Caerphilly
Caerphilly 5K takes place in Caerphilly on 08 August 2027. Organised by Caerphilly 5K. Published venue: Rosita's Cafe & Bar, Caerphilly. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£10–£19
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Chepstow · Chepstow Racecourse, Chepstow, Monmouthshire, NP16 6EH
Races at Chepstow Racecourse on a mixture of tarmac and trail, starting and finishing in front of the grandstand.
£29.40–£35.70
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Pwllheli · Plas Heli
BILLY KENNY 5KM takes place in Pwllheli on 12 September 2027. Check the organiser’s page for the route, start arrangements and eligibility.
£15.90
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Work out your target 5k time and pace.