Red Rock Reservoir is a large artificial lake located in Marion County, Iowa. It was created by damming the Des Moines River and covers approximately 5,000 acres. The reservoir is popular for various recreational activities, including fishing, boating, and camping, making it a favorite destination for outdoor enthusiasts. The area surrounding Red Rock Reservoir features several parks and trails, providing opportunities for hiking and wildlife observation. The U.S. Army Corps of Engineers manages the reservoir, ensuring its maintenance and promoting conservation efforts. The reservoir also plays a crucial role in flood control and water management for the region.