Information - Rib Mountain State Park (WI)

Migration site

Rib Mountain State Park (WI)

Contacts

Daniel Bellich Contacts

Web site

https://dnr.wisconsin.gov/topic/parks/ribmt

Last count 

21 November 2025

Observation hours

55:05 observation hours, 2 year

lat: 44.92075, lng: -89.69512

Description

Rib Mountain is the third highest point in Wisconsin at 1,942 feet above sea level and, at 741 feet above the surrounding terrain, is the tallest hill in Wisconsin. It was formed as a state park in 1927 and dedicated in 1934. Currently, the park's area is approximately 1600 acres. The top of the 60-foot tall, Van Douser observation tower is about 800 feet above the surrounding terrain and offers spectacular views. The tower was erected and dedicated on June 7, 1959.

The formation of Rib Mountain began some 1.5 to 2 billion years ago with the violent fusion, through intense heat, of sand into mammoth chunks of quartzite. Beginning 1.5 billion years ago, the surrounding plains started eroding away. The incredibly hard quartzite, however, resisted this erosion. Over the succeeding hundreds of millions of years what remained rose higher and higher over the surrounding area, and is now called a “monadnock” by geologists. Rib Mountain is one of the oldest geologic formations on earth.

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