Mount Hood at Mirror Lake

Mount Hood is a dormant stratovolcano, composed of andesite and dacite lava and pyroclastic deposits. It last erupted in 1865 A.D. Mirror Lake is located about 7 miles (about 4 Km) southwest of the 11,245 foot (3,426 meter) summit.

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Mount Hood from Mount St. Helens

This is the view from active Mount St. Helens in Washington State, about 60 miles (36 Km) to the northwest of Mount Hood.

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Mount Jefferson and Black Butte

In this view, only the very peak of Mount Jefferson rises above the clouds behind Black Butte. Mount Jefferson is an extinct stratovolcano, composed of andesite and dacite lava and pyroclastic deposits. The last eruption occurred over 50,000 years ago. The volcano erupted on overlapping shield volcanoes. Taken from Lava Butte in the Newberry National Volcanic Monument.

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Here's a sunset image taken between Mount Jefferson and Black Butte

Mount Jefferson Close-Up

The peak of Mount Jefferson rises above the Mount Jefferson Wilderness in this late fall image.

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Aa Lava and Fall Colors

Aa lava contrasts with the fall colors in the Mount Jefferson Wilderness south of the volcano.

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The Three Sisters

From left to right, the three peaks are called the South Sister, the Middle Sister, and the North Sister. The Middle and North Sisters are extinct, having last erupted 50,000 and 100,000 years ago, respectively. The South Sister is considered dormant and last erupted about 1,900 years ago.

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Here's an image of a snowbow from the vicinity of The Three Sisters

Mount Thielsen

Mount Thielsen is an extinct shield volcano. The summit has been eroded into sharp peaks by glaciation. Composed of basalt to andesite lava, the last eruption is estimated at around 290,000 years ago. Its jagged peaks are prone to frequent lightning strikes and climbers to the summit have reported numerous tubes of sand fused into glass called fulgurites.

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