There are two events coming up that have to do with Warmachine and Hordes. Both should be a ton of fun.
Recruits-con
September 17th - 19th
Lee's Summit, Missouri
http://recruits.mtswebsites.com/index.php
The event host all sorts of miniature war games including 40k and fantasy. They will also be hosting an invitational qualifier for Warmachine Weekend. Money raised goes towards the school club that host it.
Warmachine Weekend
October 22nd - 24th
Springfield, Missouri
http://www.warmachineweekend.com/
The one of the largest Warmachine / Hordes event in the country (first being Gencon). Hosting many different styles of play from casual, to Hardcore, small points to epic levels. They usually have a format to fit your style of play.