Mount Washington, Extinct volcano in Cascade Range, Oregon, US.
Mount Washington is an extinct volcano in the Cascade Range with a prominent volcanic plug crowning its summit. Steep cliffs mark its sides, shaped by ancient lava flows that cooled and fractured over thousands of years.
The mountain formed through volcanic activity with its final eruption occurring over 250,000 years ago. Basaltic and andesitic lava spread across the landscape from multiple spatter cones that remain visible today.
Six young adventurers from Bend made the first recorded ascent of Mount Washington in 1923, marking the beginning of mountaineering activities.
The wilderness area features multiple hiking trails suitable for visitors with varying experience levels. Access is best during warmer months when snow and ice clear from the paths.
The mountain displays a rare blend of shield and stratovolcano characteristics, with numerous dikes radiating outward from its central plug. This internal structure sets it apart from most other volcanoes in the region.
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