London Marathon 2027
Join team ROS in one of the most famous events in the world.
Cardiff Half 2026
Unfortunately all our 2026 places are filled, but please do contact: fundraising@theros.org.uk to register your interest for the 2027 event.
Run the Cardiff Half Marathon 2026
The Principality Cardiff Half Marathon has grown into one of the largest and most exciting road races in Europe. It's Wales’ largest mass-participation and multi-charity fundraising event and the second largest half marathon in the UK.
Its flat, fast course passes all the city’s most breathtaking scenery and iconic landmarks including Cardiff Castle, the Principality Stadium, the Civic Centre and stunning Cardiff Bay.
Thousands of spectators turn out to cheer you on in a city renowned for its sporting passion.
What you'll receive:
Your own FREE team ROS t-shirt or running vest
Fundraising pack full of tips and advice
Fundraising resources toolkit
Ongoing fundraising support from our friendly team
Frequently asked questions
We'll send you your ROS running vest once your place is confirmed and all fees paid.
We ask that you raise at least £300
Your fundraiser could support people living with osteoporosis by powering life-changing research, getting people diagnosed and treated faster – so no fall ever becomes a life sentence.
And it could make sure our specialist Helpline nurses, local support groups and expert resources exist for people feeling broken - by the pain, isolation and fear osteoporosis causes.
Your support means No More Broken Bones. No More Broken Lives.
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