Errigal Cycling Club has regular Sunday runs throughout the year which are suitable for all levels of cyclist . They also have midweek runs , usually Tuesday evenings , from April till September . Visitors and non club members are always welcome to join us . Full details of times and start locations are posted on their Facebook page . Helmets are compulsory . They also host a number of tours throughout the year with their annual Woman’s only tour (50km) and the Hills of Donegal tour both taking place in June .