Riding for the Disabled Association - Coleraine Group RDA Coleraine provides horse riding opportunties to persons with a disability in the Causeway Coast and Glens area, at no cost to the disabled participant. RDA Coleraine provides over 125 rides per week, which is only achieved through the dedication of our small but dedicated team of volunteers and our fabulous herd of 10 ponies. RDA Coleraine relies on the donations from the generous public to operate