Game fish include largemouth and smallmouth bass, walleye, northern pike, channel and flathead catfish, crappie and other panfish.

Pine Lake State Park is located on the Iowa River at Eldora.

The Cedar and its tributaries, including the Shell Rock River, can contribute to flooding events.

It tore down the historical swinging bridge in Charles City, Iowa.

On the afternoon of August 8, 2022, Marshall County Conservation staff discovered a jawbone from a prehistoric Native American of middle age or older in the Iowa River in Marshall County.