MCCULLUM CREEK. McCullum Creek rises in eastern Armstrong County southwest of Goodnight (at 35°01' N, 101°14' W) and runs east for eleven miles to the Donley county line, then runs about fourteen miles south before joining Mulberry Creek in southwestern Donley County (at 34°49' N, 101°02' W). It was named for Green McCullum, a JA Ranch employee who also served as the first foreman of the RO Ranch. The creek is in an area of moderately sloping terrain surfaced by shallow silt loams that support primarily mesquite and grasses.
Pauline D. and R. L. Robertson, Cowman's Country: Fifty Frontier Ranches in the Texas Panhandle, 1876–1887 (Amarillo: Paramount, 1981).