Experience the first ever Tywi Valley Half Marathon on August 16 — a brand-new traffic-free running event along the stunning Tywi Valley Path between Abergwili and Llandeilo.
Actif Tywi Valley Half Marathon - August 2026
The Actif Sport & Leisure Communities Team is proud to launch the first ever 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 9am. With a big turnout expected, 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.
Entry Information
- General entry price available: £30
Secure your place today by registering using the link below.
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
Volunteer with Us
We're also looking for enthusiastic volunteers to help make the event a success. Roles include:
- Route marshalling
- Supporting water stations
- Assisting at the finish line
Interested in volunteering? Get in touch with us today by email to be part of this exciting event.
Get Involved
Don't miss your chance to be part of this fantastic new event in the Tywi Valley.
Actif Tywi Valley Half Marathon
Are you ready? Take part in Actif's first ever Tywi Valley Half Marathon. Don't forget to sign up on the link above!
Frequently Asked Questions
Where does the Half Marathon start and finish?
The start and finish line will be in the same location, at Ysgol Bro Dinefwr, Ffairfach.
What time does it start?
The race begins with the first wave at 9am. Runners start times will be staggered into several waves.
How can I get my race number?
Registration will open on Saturday 15th August, at one of our leisure centres (location to be confirmed). Regsitration will re-opening on the morning of the event between 7-8am.
What is the route?
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. You will received a route map in your race pack. This is an out and back course.
Toilet Facilities
There are toilets along the course route and at the start/finish area.
What is the minimum age for the half marathon?
All participants need to be at least 18 years old on the day of the Tywi Valley Half Marathon.
What is the closing date for general entries?
General Entries will close on August 14 or when the race capacity has been reached.
Will there be water on the course?
Yes, there will be water stations located every few miles on the course and at the finish line.
Will there be a medal for finishers?
Yes, every finisher will receive a medal at the finish line.
Will I get an official finish time?
Yes, this event will be chipped timed meaning every runner will get their own finish time once they cross the mat.
Medical Support
Professional medical staff will be available at the start and finish and along the route.
Can I run with a buggy?
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.
Is the race accessible for wheelchair users?
Yes. Wheelchair users are welcome to take part. If you are entering as a wheelchair user, please contact us on actifcommunities@carmarthenshire.gov.uk to let us know.
Can I transfer my place to someone else?
Yes. You can transfer your space to someone else, however there will be a charge and a cut off date.
Can I have a refund if I can’t run?
Unfortunately we are unable to offer any refunds at this event.
Can I register on the day?
Unfortunately, there will be no on the day entries available. Registration must be done before the day.
Is there a cut off time?
Yes, runners will need to complete the course within 4 hours.
Can I wear headphones during the race?
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.
Are there races for children?
No. There won’t be any children races however there will be activities for younger ages on offer at the Race HQ in Ysgol Bro Dinefwr.
Who can I contact if I have a question?
If you have a query about the Tywi Valley Half Marathon, please email the Actif Communities Team on actifcommunities@carmarthenshire.gov.uk
Dyffryn Tywi Path
Set along the newly opened Tywi Valley Path — a £16.7 million investment by the UK Government and Carmarthenshire County Council — the half marathon follows a landmark 13-mile traffic-free route between Carmarthen and Llandeilo through the heart of the Tywi Valley.