First-ever Actif Tywi Valley Half Marathon has sold out!

  • About the event

    The Actif Sport & Leisure Communities Team is proud to launch the first-ever sold-out Tywi Valley Path Half Marathon, taking place on Sunday 16 August 2026.

    Set along the stunning new Tywi Valley Path between Abergwili and Llandeilo, this brand-new event offers runners a truly unique experience.

    Race Details

    Starting and finishing at Ysgol Bro Dinefwr in Ffairfach, this exciting race gives participants the chance to enjoy a fully traffic-free half marathon route through one of Carmarthenshire's most beautiful landscapes.

    The race will start with the first wave at 9:00am. Runners will be staggered into several groups.

  • Open to all Abilities

    Whether you're:

    • Chasing a personal best
    • Training for a full marathon
    • Taking on your first half marathon

    ...this event is designed to welcome runners of all abilities.

    More than just a race

    The event day isn't just about the half marathon! We'll also be hosting:

    • Children's activities
    • Family-friendly experiences delivered by the Actif Communities Team

Ysgol Bro Dinefwr

Event Race Pack

The online race pack is available below, and contains everything you need to know ahead of race day, including key timings, parking information, race rules, safety guidance and event facilities. Please take a few minutes to read through the information carefully before arriving.

Event HQ | Start and Finish: At Ysgol Bro Dinefwr, Ffairfach, Llandeilo, SA19 6PE

Click here to read the Race Pack

Map of the Route

This is an out and back course. Runners will start in Ffairfach and head towards the half way point near Llanarthne. Runners will turn around and make their way back to Ysgol Bro Dinefwr to the finish line.

Course Map of the Half Marathon

Race Number Collection

We strongly encourage all runners to collect their race bib before race day where possible. Race collection will be available at the following location during the week of the race:

Wednesday 12 August: Canolfan Pentre Awel, Llanelli (12:00-18:00)

Thursday 13 August: Amman Valley Leisure Centre (12:00-18:00)

Friday 14 August: Carmarthen Leisure Centre (12:00-18:00)

If you are unable to attend one of the collection events, bibs can be collected from the Event Village on race morning between 07:00am and 08:00am.

Canolfan Pentre Awel Amman Valley Leisure Centre Carmarthen Leisure Centre
Participants with a number

Frequently Asked Questions

Click the buttons below for the FAQ's, covering a range of topics, including race day information, parking, facilities, and event logistics.

  • The start and finish line will be in the same location, at Ysgol Bro Dinefwr in Ffairfach.

  • The race begins with the first wave at 9:00am. Runners start times will be staggered into several waves.

  • Registration will open on Saturday 15th August, at one of our leisure centres (location to be confirmed). Registration will re-open on the morning of the event between 7:00am and 8:00am.

  • The route follows the Tywi Valley Path from Ffairfach to the half way point just after Llanarthne. Runners will turn around and make their way back to Ysgol Bro Dinefwr to the finish line.

    You will receive a route map in your race pack. This is an out and back course.

  • There are toilets along the course route and at the start/finish area.

  • All participants need to be at least 18 years old on the day of the Tywi Valley Half Marathon.

  • Yes. There will be water stations located every few miles on the course and at the finish line.

  • Yes. Every finisher will receive a medal at the finish line.

  • Yes. This event will be chipped timed meaning every runner will get their own finish time once they cross the mat.

  • Professional medical staff will be available at the start and finish and along the route.

  • For safety reasons, buggies will not be permitted in the Half Marathon. The course is shared with other runners and includes sections that may be narrow, so to ensure the safety and enjoyment of all participants, we ask that runners do not take part with a buggy.

  • Yes. If you are a wheelchair user, please contact us on actifcommunities@carmarthenshire.gov.uk to let us know beforehand.

  • Yes. You can transfer your space to someone else, however there will be a charge and a cut off date to complete the process.

  • Unfortunately, we are unable to offer any refunds for this event.

  • The event has sold out. 

  • Yes. Runners will need to complete the course within 4 hours after they cross the start line.

  • Unfortunately, headphones are not permitted during the half marathon event unless they are bone conducting. This is to ensure the health and safety of everyone taking part and enables runners to be able to hear any instructions from marshals.

  • No. There won’t be any children races, however there will be sporting activities for younger ages on offer at the Race HQ situated outside Ysgol Bro Dinefwr.

  • If you have a question about the Tywi Valley Half Marathon, please email the Actif Communities Team by email on actifcommunities@carmarthenshire.gov.uk

Race Day Schedule

  • 1 07:00: Event Hub Opens

    Ysgol Bro Dinefwr

  • 2 07:00: Information Hub Opens

    Ysgol Bro Dinefwr

  • 3 07:00: Baggage Drop Opens

    Between the school and sportshall at Ysgol Bro Dinefwr

  • 4 08:30: Start Pens Open

    Outside Ysgol Bro Dinefwr

  • 5 08:45: Race Briefing & Warm Up

    Start Line

  • 6 09:00: Race Start

    Outside Ysgol Bro Dinefwr

  • 7 13:00: Final Finisher Expected
  • 8 14:00: Event Closes

Event Hub at Ysgol Bro Dinefwr

Here's what you'll find in the Event Hub on the race day from 7:00am...

  • Information Point

    Race information & support

  • Race Number Collection

    Open between 7:00am and 8:00am if unable to collect prior to the day

  • Bag Drop

    Secure bag storage

  • Toilets

    On-site toilet facilities

  • Massage Area

    Recovery & massage area

  • Refreshments

    Food and drink by our caterers

  • Water Refill Station

    Refill your water bottle

  • First Aid

    First aid available on site

  • Meeting Point

    Finish Line Meeting Point

About the Tywi Valley Path

About the Tywi Valley Path in Carmarthenshire

Investment by UK Government and Carmarthenshire County Council

Set along the newly opened Tywi Valley Path — a £16.7 million investment by the UK Government and Carmarthenshire County Council

Tywi Valley Path Map
About the Tywi Valley Path in Carmarthenshire

13 mile route linking Carmarthen and Llandeilo Town Centres

The path follows a landmark 13-mile traffic-free route between Carmarthen and Llandeilo through the heart of the Tywi Valley.

Tywi Valley Path
About the Tywi Valley Path in Carmarthenshire

Stunning Scenery

Offers uninterrupted countryside views, rolling hills, riverside meadows, and wildlife spotting opportunities.

Tywi Valley Path
About the Tywi Valley Path in Carmarthenshire

Accessible for All

The path supports sustainable travel, promotes healthier lifestyles, and stimulates local tourism and the rural economy

Tywi Valley Path

Volunteer with Us

Can you spare a few hours on 16 August? We are looking for enthusiastic volunteers to help make the event a success. Volunteering roles on event day include:

  • Route marshalling
  • Supporting at water stations
  • Assisting at the finish line (water, medals assistance)

Missed out on a space or interested in supporting the event by volunteering? Get in touch with us today by email to be part of this exciting event.

Click here to enquire about event volunteering
Water Station