Length: 241.5 mi. Direction: south-north. Oklahoma State Highway 99 (SH-99) is a highway in the central part of Oklahoma, that begins in Lake Texoma at the Texas state line, and ends near Lake Hulah at the Kansas state line. The road passes through the counties of Lake Texoma, Marshall, Johnston, Pontotoc, Seminole, Pottawatomie, Lincoln, Payne, Creek, Pawnee, and Osage. It was opened in 1938.
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