I draw a weekly sports cartoon called Guts Without Glory, which (as of this writing) runs in about 10 newspapers around the country. No, I won't retire on the income ;-)
I do my best to sneak in a running-related cartoon from time to time. I usually forget to post them here, but thought I'd post this week's offering, since it's somewhat autobiographical (I just made the runner a woman instead of a man in this case.)
Perhaps you can relate?