Get Involved Our fundraising events Leeds Half Marathon 2020 Take on the Asda Foundation Leeds Half Marathon. The route has been described as an effective stepping stone for the Yorkshire Marathon as you are challenged with similar hilly terrains. The event builds to a fantastic finale as you cross the finish line in a packed Millennium Square - what better way to celebrate your achievement! By raising funds for the British Thyroid Foundation you will be helping to support people of all ages with a thyroid disorder. How to apply for the Leeds Half Marathon Sign up below to register a place in the marathon. We ask our fundraisers to pay a £20.00 registration fee and have a minimum sponsorship target of £150. Once you have registered we will send you a registration form asking for your details and if you would like a BTF t-shirt to wear on the day! Thank you for your support! Booking for this event has now closed.