rib mountain

Rib Mountain (also known as Rib Hill) is a glacially-eroded monadnock in central Wisconsin, located in the Town of Rib Mountain in Marathon County. Composed of quartzite covered with a softer syenite sheath, it was intruded about 1.5 billion years ago. Rib Mountain is at latitude 44 55' 15" north and longitude 89 41' 40" west, near Wausau on the west side of the Wisconsin River, just west of Interstate 39 and just south of Wisconsin State Highway 29. Although, Rib Mountain is not the highest point in Wisconsin and not technically even a mountain, it is almost 4 miles long and peaks at 1924 feet above sea level and 640 feet above the local terrain, the highest difference of height from peak to surrounding terrain in the state of Wisconsin. Rib Mountain is home to the Rib Mountain State Park and the Granite Peak Ski Area (formerly Rib Mountain Ski Area).

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