The geological history of the Dubuque vicinity is laid bare in this area. A thick layer of Ordovician dolomite rock has been exposed in the horseshoe-shaped quarry. In addition, a 15-acre wetland with two floating trails gives access to a wildlife observation blind. Interpretive signs provide interesting insights into the geology, history and resources of the Mines of Spain Area.

Accessible from the main park road, this trail features a scenic overlook at the north end. From here you can see the Julien Dubuque monument to the north and view the old quarry to the south with the Mississippi River in the background. Interpretive signs explain the parks geological history. You can also enter the quarry from the south going past the wetland. There are steps along the Eastern edge and trail ramp to the West.

Rich in history and natural resources, the Mines of Spain State Recreation Area in Dubuque is a National Historic Landmark waiting to be explored. Village sites, rock shelters and trading post sites dot the landscape, and the area was once the location for lead mining until after the Civil War. The Julien Dubuque Monument, honoring the area’s first European settler, sits high above the Mississippi River and serves as a landmark for the Mines of Spain area. This state recreation area provides ample opportunity for visitors to explore a variety of trails and learn more about the history of the state.