Built in 1963, a 10' concrete block base topped by a wooden live-in cab was replaced by a 50' enclosed observation tower in 2010. It is staffed every summer.
Bureau of Land Management
20 miles east of Fort Rock
Lake County, Oregon
Elevation 5190'

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Green Mtn. L.O. Green Mtn. in 2019
Photos courtesy of Howard Verschoor and Bob Yandow