The Trinity, a major Texas river rises 250 yards west of this 1250-foot mound. South of this site water drains to the Brazos, and north and west to the Red. This high point has been important in Texas history. It guided Capt. Diego Parilla to battle Indians on the Red in 1759 and aided Capt. R. B. Marcy in mapping a California trail in 1849. Marcy and Maj. R. S. Neighbors used it as a beacon point in finding a site for an Indian reservation in 1854. It also was on U.S. Cavalry maps for 1870s Indian campaigns. (1976)