The Barcaldine Tree of Knowledge Festival is Barcaldine’s largest event, both in terms of visitation and community participation. The festival showcases the community spirit and history of Barcaldine and Outback Queensland. The Barcaldine Tree of Knowledge is a historical attraction that is known as the birthplace of the Australian Labor Party (ALP) and influences the longest-running May Day Parade. Staged over the labour day long weekend, the four-day celebration showcases live entertainment, markets, horse and goat racing, Barcy RevFest, May Day parade and other special themed events.