The Appalachian Trail crosses the river's uppermost headwaters. The highest elevation is northwest of Augusta near Femme Osage Creek headwaters. The narrowest point is in the headwaters, an unnavigable marsh in Indian River County. "A. gouldi" inhabit slow-moving rivers and streams of several sizes including headwaters and rivulets. Thus measured to its highest headwaters, the Missouri River stretches for . The jurisdiction took its name from the headwaters that emanate there, the Appomattox River. Another important stream is Amazon Creek, whose headwaters are near Spencer Butte. Alexander did not continue, thus leaving all the headwaters of the Indus River unconquered. Above this point is the extensive catchment of the headwaters of the Rhine. Upstream in the headwaters, salmon runs are the main source of nutrients. Order is from the headwaters downstream. It is frequently produced around the headwaters of chalk streams. In 1955, there were six small glaciers in the area of the headwaters. Exposures between Route 490 and the headwaters of Flat Landing Brook are the type locality. According to him, this event took place northeast of the headwaters of the Syr Darya.