The Grupo Desportivo, Recreativo e Cultural Leões do Sul Futebol Clube was founded on June 25th, 1976, in the village of São Bartolomeu do Sul. In 2006 he was awarded the Medal of Merit of the municipality of Castro Marim.
The football was on the origins of the club, but the most extraordinary sporting event of its long history happened in roller hockey with the dispute in the 2000/2001 season of the National Championship of Roller Hockey (South Zone), the youth level . This method was introduced in the eighties, having been created a new section of Figure Skating, which later evolve into a skating school, which operated until recently in the Municipal Pavilion of Castro Marim and formed dozens of children from municipalities in the Lower Guadiana.
The turn of the millennium has brought new ways to Sao Bartolomeu do Sul. The Sea Swimming is perhaps one of the most successful. Since August 2002, the club organizes uninterrupted proof Sea Swimming, "Castro Marim village", on the beach of Alagoa, Altura, which appears in the Algarve Sea Swimming circuit.
The pioneering South Lions extended the type of bike-terrain, which had its first success in carrying on April 4, 2004, the I Ride mountain bike "Mina de S. Domingos-Castro Marim," called Ore route for Lands and Margins Lower Guadiana.
Two years later, on July 15, 2006, the athlete Diogo Beatriz Afonso, in his second season with the lion to the chest, has won the National Mountain Bike Champion in the specialty of XCO (Cross-Country Olympic), in step Cadet Men.
In 2012 were made arrangements for triathlon and duathlon, that would also have them a national champion Nelson Master, with the sweater of South Lions knew glory in Duathlon (in step 35-39 years) and Triathlon Sprinte, in 2015.