Nestled in Bend, along the Deschutes River, is one of the finest jogging trails I've ever seen in my life.  It follows the river, which is itself breathtaking, and takes you over a beautiful pedestrian bridge.  It's a natural surface trail, which is what I prefer.  Depending on what route you take, you can expand it from just a couple of miles to many more, because it connects with other trails such as the Haul Road Trail that could take you all the way to the Mt. Bachelor ski resort if you really wanted to.  The Deschutes River is exactly what you would picture on a postcard about Oregon; rocky, clear, cold, and beautiful - just look at the pictures below.  Say what you will about Bend, it's hard to deny that it's one of the most scenic places I've ever seen.