The lineup has been revealed for this year’s Rocklahoma festival. The event will take place at the Rockin Red Dirt Ranch in Pryor, OK on August 30 to September 1 and it will feature the following: Slipknot, Disturbed, Avenged Sevenfold, Evanescence, A Day To Remember, Lamb Of God, Halestorm, Mastodon, Anthrax, Skillet, Clutch, Nothing More,…