The 1999 Yellowstone National Park silver dollar commemorative proof coin comes in the original government packaging (including a display holder, box, and outer sleeve), with a certificate of authenticity.

This series was minted to commemorate Yellowstone National Park and its importance. The obverse shows a Geyser erupting, and the reverse depicts an adaption of the Department of the Interior Seal/Buffalo.

The coin was produced at the Philadelphia Mint and has a "P" mint mark. The specified weight is 26.730 grams with a composition of 90% silver and 10% alloy.