A low ridge sends Callahan County rain two ways

The Callahan Divide is a 26-mile line of hills through Taylor and Callahan counties. It runs west to southeast and takes its name from Callahan County. Rain north of the ridge drains toward the Brazos River. Rain south of it enters the Colorado River basin. Clyde sits between those two systems, right on the divide.

The ridge starts near Cedar Creek east of Mountain Pass, passes through Buffalo Gap, and ends near Lytle Gap. That end is about a mile north of Dudley in west-central Callahan County. The hills range from 1,898 feet at Buffalo Gap to 2,411 feet near the west end. They can turn rain two ways without looking like a mountain wall.

The North Prong of Pecan Bayou begins on the divide near Eula. It runs southeast through Callahan County and is dammed south of Clyde to form Lake Clyde. The North and South prongs meet in south-central Callahan County. From there, the bayou crosses Coleman County and reaches the Colorado River in Mills County. A low ridge near Clyde sets which way that long trip begins.