Marshall Gold Discovery State Historic Park, Historic site and state park in Coloma, United States.

Marshall Gold Discovery State Historic Park is a 576-acre state park in El Dorado County, California, preserving the site where James W. Marshall found gold at Sutter's Mill on January 24, 1848. The park includes much of the historic town of Coloma, a National Historic Landmark District, with over 20 historic buildings and a replica of Sutter's Mill built in the late 1960s.

James Marshall's discovery of gold flakes at Sutter's Mill in January 1848 triggered one of the largest population movements California would experience. News of the gold deposits brought roughly 300,000 people to the region within a few years.

The park displays how people from different backgrounds lived and worked together during the gold rush era. You can see mining tools, household goods, and personal items that belonged to miners and Native American communities.

The grounds offer gold panning activities and hiking trails along the American River with varying difficulty levels. Guided walks through the reconstructed buildings help visitors understand what daily life was like during that era.

The Marshall Monument was funded with $9,000 appropriated by the State Legislature after the Native Sons of the Golden West, Placerville Parlor #9, petitioned for it in 1886. It was unveiled on May 3, 1890, before a crowd of 3,500, nearly five years after Marshall died on August 10, 1885, and was the first monument of its kind erected in California.