The state park preserves the site of the Rock Point Stamp Mill, which was built in 1861 to process silver ore mined from the Comstock Lode.

The park's main entrance is in the "lower" or eastern portion which preserves a section of woodlands along the Carson River.

The "upper" or western section of the park can be accessed through a pedestrian tunnel that runs beneath U.S. 50 to the Rock Point mill ruins.

Wooden flumes (the remains of which are also visible) provided the necessary water for the milling process from the nearby Carson River.

The ruins of the mill include a concrete water storage tank, a reservoir and head-gage, stamp battery footings, building foundations, rock retaining walls, waterways, and “hermits cave.”[4] Remnants of the garbage dump are visible, as is a section of the old U.S. 50.