This event started in 1968 and has been organized as a joint project by the San Antonio River Walk Association and the Harp & Shamrock Society of Texas ever since. Green beer will be sold at the Arneson River Theatre along with Irish and other ethnic foods. Festival entertainment includes a family-friendly interactive activity called Passport to Ireland.

Other festival activities include face-painting, henna artistry, caricatures, Irish food, photo booth, Irish novelty items for sale and officially-licensed River Walk merchandise. Musical entertainment line-up announced in early January.