"The Brazos does not come from haunts of coot and
hern, or even from mountains. It comes from West Texas, and in
part from an equally stark stretch of New Mexico, and it runs for
something over 800 miles down to the Gulf. On the high plains it
is a gypsum-salty intermittent creek; down toward the coast it is a
rolling Southern river, with levees and cotton fields and ancient
hardwood bottoms. It slices across Texas history as it does across
the map of the state; the Republics first capitol stood by it, near the
coast, and settlement flowed northwestward up its long trough as the
water flowed down."
From John Graves Goodbye to a River
1957

Brazos River Watershed Information Center
About the
Brazos River
Texas Parks and Wildlife Information on the Brazos
Maps of Texas from TCEQ