Mines of Spain State Recreation Area and E. B. Lyons Nature Center

Mines of Spain State Recreation Area and E. B. Lyons Nature Center
Iowa State Park
Julien Dubuque's monument
Named for: Julien Dubuque's Mines
Country	United States
State	Iowa
County	Dubuque
Location	Dubuque
- elevation	751 ft (229 m)
- coordinates	42°27′45″N 90°39′45″W / 42.46250°N 90.66250°W / 42.46250; -90.66250Coordinates: 42°27′45″N 90°39′45″W / 42.46250°N 90.66250°W / 42.46250; -90.66250
Area	1,380 acres (558 ha)
Founded	1981
Management	Iowa Department of Natural Resources
Location of Mines of Spain State Recreation Area and E. B. Lyons Nature Center in Iowa

The Mines of Spain State Recreation Area and E. B. Lyons Nature Center is a state park in Dubuque County, Iowa, USA. It is near Dubuque, the eighth-largest city in the state. The park features picnic areas, 15 miles (24 km) of walking/hiking trails, 4 miles (6.4 km) of ski trails, and the Betty Hauptli Bird and Butterfly Garden. It also includes archaeological sites of national importance as an early lead mining and smelting venture led by French explorer Julien Dubuque, as well as Dubuque's gravesite. These sites were collectively designated a National Historic Landmark District as Julien Dubuque's Mines.

Meskwaki Indians were believed to be the first people in the area, residing in the area for up to 8000 years previous to discovery by Julien Dubuque, believed to be the first European to set foot in Iowa. The Meskwaki had been trading furs with French Voyageurs, as well as mining lead in the area. The Governor of Spain gave Dubuque a grant to work Spanish-owned land, naming the 1,380-acre (560 ha) area The Mines of Spain. Mining would continue by the Meskwaki, then by European settlers until 1914. These activities left a complex of archaeological sites, including prehistoric native settlement sites, the mining village of the Meskwaki, Dubuque's trading post, the mining areas themselves, and later mining-related areas.

From a horseshoe-shaped area, Horseshoe Bluff, the geology of the area is visible. Ordovician dolomite is evident, and two trails lead to a blind.