Events such as the heavy horse show, horse races on the beach, fairground rides, live music, entertainment and stalls selling all kinds of fantastic foods and gifts as well, of course, as old favourites such as dulse and yellowman, got everyone into the festival mood.
Here are some pictures from the events on Saturday.
1. Holding on tight
Shae Butler starts early in life at the ould Lammas Fair Heavy Horse Show. Photo: McAuley Multimedia
2. Dulse and yellow man for the mayor
Mayor of Causeway Coast and Glens Borough Council Steven Callaghan tries some dulse and yellow man from the Dessert Bar in Ballycastle. Photo: McAuley Multimedia
3. On the run
Taking part in the Lammas Fair beach horse racing organised by the RDA and Causeway Coast and Glens Borough Council. Photo: McAuley Multimedia
4. Horses on parade
Hugh McCaughan pictured at the Lammas Fair horse parade in Ballycastle on Saturday. Photo: McAuley Multimedia