Cookson, Oklahoma is located in the scenic Cookson Hills. Lake Tenkiller is the clearest lake in Oklahoma. Approximately 13,000 acres of clear blue water to fish, boat, scuba dive, water ski, swim, tube and much more! The rocky bluffs and serene, lush forests provide beautiful scenery from any spot on the lake. The sunsets have been ranked as one of the most engaging sights in the state. The clear night skies afford an infinite array of stargazing, perfect for nighttime romance.