The Ondava flows south through the towns Svidník, Stropkov and Trhovište, and through the Ondavská Highlands. It is  long and its basin size is .
The Ondava River's course takes it southward, passing through the towns of Svidník, Stropkov, and Trhovište, and traversing the Ondavská Highlands. Its length is considerable, and its basin encompasses a large area.