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Opal Terrace

Opal Spring flows from the base of Capitol Hill, forming terraces of travertine.

Opal Spring flows from the base of Capitol Hill, which is across the road from Liberty Cap. After years of dormancy, this spring became active in 1926 and began depositing up to one foot (0.3m) of travertine per year. In 1947, a tennis court was removed to allow natural expansion of the terrace. Further growth threatens the historic home next to Opal Terrace. Designed by Robert Reamer and built in 1908, the house is an example of Prairie Style architecture. Among Reamer's other designs are the Old Faithful Inn and the Roosevelt Arch at Yellowstone's North Entrance. Today sandbags and an earthen wall protect the house. The National Park Service strives to protect both historic and natural resources. At Opal Terrace both types of resources must be considered.

Mammoth Hot Spring Tour
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