Hello how may I help you? I need some facts about a city Sure, I can help you with city facts What river runs through Prague? The river that runs through Prague is the Vltava river How long is it? It is 267 miles long How wide is it? It varies, but is as wide as 3 miles in some spots. How deep is it? That varies as well, but it gets to as much as 65 feet deep at points.