I live in rural Washington state, with wide dirt roads in every direction for about 20 miles each - perfect for running if you don't mind never having shade. When my wife and I moved here a year and a half ago we were offered a stray cattle dog. This has lead to some truly memorable morning runs: there's nothing quite like runing out on the free range, coming up on 200 head of cattle, listening to them bellow and watching them all trample their way to the corner of their huge area just because there is a 45-pound dog racing along like a madman.
But my favorite was when we were running up a particularly tough hill, and in coming around a corner, he scared a 400-500 pound cow so badly that it jumped over a 3.5 foot barbed wire fence. It wasn't the cleanest clearance, but there wasn't any blood, either.
I've since told this to people around town, but all they seem concerned about is that in chasing it over a fence, my dog probably donated the cow to one rancher, while effectively stealing it from the other. So I've stopped telling it for the most part. But I don't know if I've ever seen anything quite as amazing as watching that cow fly.