The Cascade Range is noted for its soaring stratovolcanoes like Mount Shasta, but it also has a number of huge hullking shield volcanoes, similar to those in Hawaii. Medicine Lake sits in the caldera at the top of one of these, surrounded by miles of gradually sloping lava flows and hundreds of cinder cones. Notable are the many lava tube caves and several flows of obsidian, black volcanic glass.
Medicine Lake and the surrounding area are sacred to Native Americans. There has been development of geothermal power.
 | Mammoth Crater on the lower slopes of the Medicine Lake Highlands was the main source of the lava flows to the north (July 21, 2011) Standard Size or Large Size | |
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 | A sandy beach and drifts of yellow pine pollen at Medicine Lake (July 21, 2011) Standard Size or Large Size | |
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 | Vacation cabins and campgrunds are scattered around the shore of Medicine Lake (July 21, 2011) Standard Size or Large Size | |
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 | Tiny Bullseye Lake is one of several east of Medicine Lake (July 21, 2011) Standard Size or Large Size | |
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 | Jot Dean Ice Cave shelters year-around ice deep within the lava beds (July 21, 2011) Standard Size or Large Size | |
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 | The Medicine Lake Highlands are covered with fine forests managed for timber production, especially Jeffrey pines as seen here (July 21, 2011) Standard Size or Large Size | |
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