So I get this e-mail today. Apparently if you ran the Publix Atlanta half or full you can get a bonus medal if you also run the Allstate half. I can't find anything about this on the interwebs, but if true, I'm in.
There is the Locomotive Race Series up in Kennesaw (suburb northwest of Atlanta) that if you run all four races you get a special medal, or at least you used to but I can't find it on the website right now. It's about to start up again with a 5k on May 19th, a 10k sometime over the summer, a 15k in September, and the a half I think in February. DH and I have talked about doing it for a couple years, but I think we might actually do it this year provided we can make all the races. At this point they haven't posted any dates past the Freight Train 5k. If I remember correctly each of the longer races has a 5k as well but I don't think you can earn the special medal for running only them.