Rocky Butte is an extinct volcanic cinder cone in Portland, Oregon, United States. It is one of three, along with Powell Butte, and Mount Tabor, inside the city that are each home to a city park, Rocky Butte playing host to Joseph Wood Hill Park. It is also part of the Boring Lava Field, a group of over 30 cinder cones in Oregon and Washington. The slopes of Rocky Butte are also home to the Rocky Butte Natural Area. In addition, it used to be home to a jail and now lies next to Interstate 205.
Formerly known as Wiberg Butte, a large quantity of rock was removed from the quarry on the east face of Rocky Butte in the 1940s for use in a new Multnomah County jail. After the jail was demolished in the 1980s, much of the stone was reused along the Historic Columbia River Highway. In the early 1900s, the Union Pacific Railroad had a spur into the east side of the Butte at a station named Quarry.
This is really cool, each arrow points to the mountain and show the elevation. As you can see Mt. St. Helens height in 1980 before it erupted.
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