Fall Fitness?

So I'm jealous. I just recently got back into blogging and I've missed all the fun summer weightloss challenges. There's the Lose a Marathon, Lose a Half Marathon, Summer Sizzle Slim Down Challenge, etc. etc. etc. I love being a part of those type of things because A) it keeps me on track, B) I get to meet new people, and C) it gives me something to talk about on my blog when I get writer's block. :)

Anyways, my point is, does anyone know of any challenges that will start soon? Anything for the fall? I'm so ready to get involved!