The Gasconade River is about 280 miles (450 km) long and is located in central and south-central Missouri in the United States.
The Gasconade River begins in the Ozarks southeast of Hartville in Wright County and flows generally north-northeastwardly through Wright, Laclede, Pulaski, Phelps, Maries, Osage and Gasconade counties, through portions of the Mark Twain National Forest. It flows into the Missouri River near the town of Gasconade in Gasconade County.
The name Gasconade is derived from "Gascon", an inhabitant of the French region of Gascony. The people of that province were noted for their boastfulness. It was applied by the early French to the Indians living on its banks who bragged about their exploits. The name means to boast or brag, and thus the river received its name. The waters of the river are boisterous and boastful and the name is also descriptive.
The headwaters of the Gasconade are in the southeastern corner of Webster County northeast of Seymour, Missouri where it drains the eastern margin of the Springfield Plateau at approximately 37°11′54″N 92°41′44″W / 37.19833°N 92.69556°W. The river joins the Missouri River at the city of Gasconade at 38°40′28″N 91°32′55″W / 38.67444°N 91.54861°WCoordinates: 38°40′28″N 91°32′55″W / 38.67444°N 91.54861°W. The river follows a meandering course through the Ordovician age dolostone and sandstone bedrock of the Ozark Salem Plateau creating spectacular bluffs and incised meanders along the way. Numerous springs and caves occur within the drainage area and along the river course. Significant tributaries include the Osage Fork of Webster and Laclede counties and Roubidoux Creek and Big Piney River of Texas and Pulaski counties. The Roubidoux and Big Piney flow respectively along the west and east boundaries of Fort Leonard Wood which lies a short distance south and east of the Gasconade.