The running community is a close one. We're supportive and can celebrate acheivements at any level. (Kind of like the writing community.) But what is it that unites us? It's not that we've all hit the wall while running a marathon. It's not that we're all super-elite athletes.
Is it that we simply share an interest? Would we be equally supportive if we all loved cross stitch samplers or followed weather patterns? I know there are communities of people that do love these things, and I'm not knocking them, but any runner would have to agree that it's more than a hobby we share.
My theory is that we've broken into a secret place. We're the ones that figured out the combination to the lock and now we're enjoying the spoils. And while we can tell others how wonderful running is (no, really!) and we can give them the combination to that lock, until they want it enough, they'll never open it.
I share a lot about my writing endeavors on this blog. Writing has its own secret place, its own supportive community. I consider myself very fortunate to have two secret places.