Multnomah County topographic maps
Click on a map to view its topography, its elevation and its terrain.
Forest Park
United States > Oregon > Multnomah County > Portland
Solidified lava from Grande Ronde members of the Columbia River Basalt Group underlie Forest Park. About 16 million years ago during the Middle Miocene, the Columbia River ran through a lowland south of its modern channel. Eruptions from linear vents in eastern Oregon and Washington flowed down this channel…
Average elevation: 91 m
Gresham
United States > Oregon > Multnomah County
Though much of Gresham is relatively flat, it is characterized by a hill on its eastern border. Northeast Gresham is also hilly, particularly where the city meets Troutdale toward the Columbia River. Its elevation is 325 feet (99 m). Johnson Creek, which begins at the foothills of the Cascade Mountains, runs…
Average elevation: 90 m
