High Quality Content by WIKIPEDIA articles! Prairie Dog Town Fork Red River is a sandy-braided stream about 193 km (120 mi) long, formed at the confluence of Palo Duro Creek and Tierra Blanca Creek, about 2.9 km (1.8 mi) northeast of Canyon in Randall County, Texas, and flowing east-southeastward to the Red River about 1.6 km (1 mi) east of the 100th meridian, 13 km (8 mi) south-southwest of Hollis, Oklahoma. The Prairie Dog Town Fork Red River is the southernmost of two major forks which form the headwaters of the Red River. It begins as an ephemeral stream on the level surface of the Llano Estacado in Randall County, about 6.4 km (4 mi) northeast of Canyon, Texas. The stream initially runs northeastward then southeastward across Randall County, flowing through Palo Duro Canyon where it is fed by springs, providing a base flow that is often increased significantly by runoff from rainstorms.