The longest of the two has its headwaters on Johnson Mesa west of Folsom in northeastern New Mexico and flows through Oklahoma, Colorado, and Kansas before reaching the Arkansas River above Tulsa, Oklahoma.
The longest of the two extends over 1123 km. Its headwaters are located on the Johnson Mesa west of Folsom in northeastern New Mexico. It flows through Oklahoma, Colorado, and Kansas before flowing into the Arkansas River above Tulsa, Oklahoma.