Mountains surround the valley, including the Lyrkeia mountains as well as the Mainalo mountains to the southwest. The valley consists of vineyards, potato and wheat farms, as well as other crops, and covers about half of the municipality. Several floods ravaged Mantineia in the mid-20th century, even to the extent of forming a lake that has since been drained. Forests dominate the mountains. Rocks and grasslands cover most of the northeast.