Frentress Lake is a 24,580-acre reservoir in northwestern Illinois, fed by the Mississippi River near the borders of Iowa and Wisconsin. Located in Jo Daviess County, the lake features preserved shorelines and offers a water clarity of 2-4 feet. The lake reaches a maximum depth of 46 feet and sits at an elevation of 591 feet.

Multiple boat docks and launching ramps are available around the lake at no cost, providing convenient access points for paddlers. While there are no lodging facilities directly on the lake, numerous accommodation options can be found in nearby Illinois, Iowa, and Wisconsin communities.

The lake's aquatic ecosystem supports diverse fish populations, including largemouth bass, bluegill, crappie, and bullheads. This active fishery means paddlers should be aware of fishing activity, particularly near the shoreline fishing spots.

The nearest major airport is Dubuque Regional, located 15 miles from the lake, making it easily accessible for traveling paddlers. Notable landmarks in the vicinity include Mines of Spain State Park (1 mile away) and the Sundown Mountain recreation area (15 miles away).

The lake's substantial size and connection to the Mississippi River system suggests paddlers should be prepared for varying conditions and potential barge traffic. The surrounding area features preserved shoreline that provides natural scenery for paddlers exploring the waterway.

Coordinates: 42.4657N -90.6077W