The Spessart Nature Park () covers an area of 2,440 km² within the German hill range known as the Spessart. The geological foundation of the nature park is formed by a Bunter sandstone plate, up to about 400 metres thick, which tilts towards the southeast. The nature park includes the largest contiguous area of mixed forest in Germany. Deep valleys, gentle hillsides and heights characterise the landscape of the Spessart.