As an occasional runner - it's hard to say.
In the evenings, I do either a 5k run or a 30k bike ride.
A good pace run for me is 24:15 for the 5k - but that's in 32c/90f temperatures with usually around 55-60% humidity. If I'm elsewhere - like a recent trip top Chicago with 10c/50f and 6% humidity, it takes me about 22 mins pushing it a bit.
I don't run long distances. Friends will tell me "you just did 22 mins exercise, what's the point in that?". I sweat like a blind lesbian in a fish market for about 40 mins after the run. It's just a short, hard run that leaves you feeling better afterwards.
I don't see this type of exercise as a big fat burner. It's about 370 cals burnt according to my iPhone app. I guess if I was on a diet it might be but as it is, my weight stays fairly constant and only a change in what I eat seems to impact my weight. If I do restrict my calories, it drops off pretty quickly.
On the downside - my legs have definitely changed doing this. Not the twiggy marathon runner legs - but definitely smaller. I still squat twice a week but the running has pretty much dictated how my legs look now.
And Calves sure ain't grown either...