Mount Sylvania

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Mount Sylvania
Elevation 958 feet (292 metres)
Location Oregon. USA
Range Boring Lava Field
Coordinates 45°26′18″N, 122°43′16″W
Topo map USGS Lake Oswego 45122-D6

Mount Sylvania is a dormant volcano on the outskirts of Portland, Oregon. The mountain is a part of Portland, Lake Oswego, and Tigard. Mountain Park, a Lake Oswego suburban development, was built on the mountain in the 1970s.

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