This early Bill Murray-comedy is no movie about running, but a fairly typical summer camp movie – dad sends kid to summer camp, he doesn't want to go and has trouble making friends, makes friends in the end. Running is featured, however, as the grand finale between two rivalry summer camps (after a hotdog-eating contest, some swimming et cetera).
Running in Meatballs (1979), © 1979 Paramount Pictures
This movie's from 1979 and it shows. It's still funny, but I guess you'll have really like Bill Murray or be in that summer-camp-movie mood to enjoy it. Or sit through it and wait for the running, of course.