Palo Alto is the closest thing you have here for 600yd, pascaquoula Ms for 1000yd.
F class and Mid Range Prone Matches the first saturday of every month
NRA Highpower accross the course on the 3rd Satuday of every month
there is even an un NRA sanctioned Tactical Longe Range on the second saturday of every month that Ritten has started up. Basically F Class loaded from a Mag and Suppressors are allowed.
You do not need to be a member of Palo Alto to compete, but do need to be a member to shoot any other time. Go to the Palo Alto Website if you want to join, or come shoot a match if you want to try it out.