Flix Main Festival Activity · Flix, Ribera d'Ebre, Tarragona Image of Flix, not of the place itself. The main festival of Flix, in the Ribera d'Ebre (Tarragona), is celebrated on 15 August. Among its events, the river festival stands out, with a race of puntons (traditional boats) on the Ebro, which gives the celebration a distinctive character linked to the town's river-based trade. Photo: Victuallers (CC BY-SA 3.0) What to see and do in Flix