Surrounded by the towns of Saint-Zacharie, Rousset and Peynier, Trets is located between Sainte-Victoire mountain and Aurelian, 25 minutes from Aix-en-Provence, 35 minutes from Aubagne and 40 minutes from Marseille, in full heart of Provence. River Arc is the main waterway of the town. Trets is a member of the Community of the Pays d'Aix, which includes 34 municipalities.
The market is held on Wednesdays and Sundays.
A medieval town walls surround the heart of the city that holds little streets and secret gardens.