US Geological Survey
U.s. Geological Survey
The U.S. Geological Survey reports on the latest news affecting the earth today, as well as providing a wealth of data, reports, and information.
US Department of Agriculture
Columbia River Gorge National Scenic Area Columbia River
This site offers information about the Columbia River, its history and gorge geology.
Ducksters
Ducksters: United States Geography: Rivers
Kids learn about the major rivers of the United States including the Mississippi, Missouri, Rio Grande, Colorado, and the Hudson. Geography of the US.
Discovering Lewis & Clark
Discovering Lewis & Clark: Geography
How did Lewis and Clark map the unknown lands? Learn how they marked the territory using mental mapping, Indian spatial concepts, and formal navigation.