The Val di Chiana valley looks like a trench about 100 km long and covers about 2300 km . The valley stretches from the north versosud between the plain of Arezzo and Orvieto and includes the catchment area of ​​the Canale Maestro della Chiana, the main stream, and the northern part of the catchment area of the river Chiani.
To the north-east it is bounded by the end of Preappennini Tuscany, among which stand the High Sant’Egidio (1,057 m), Mount Lignano (837 m) and Mount Bugle (744 m).
To the south-east reaches to the shores of Lake Trasimeno and the Valley of Nestor.
To the west of the Val di Chiana extends to the slopes of the Val d’Orcia and the slopes of Mount Cetona, the highest peak in the area, which reaches 1,148 m.

The landscape is hilly, with a long strip of flat land near the Channel Master. The average altitude is about 405 m s.l.m..