Fishing Auxiliary Reservoir in Jefferson County, Illinois

• Overview

  Auxiliary Reservoir sits in Jefferson County, out in Illinois. Height above sea level is 495 feet. The water measures roughly 12 acres, so nothing here is far from anything else. It is one of the smaller waters we list in Jefferson County. Nearest town is Sesser, 6.8 miles off. It is 68 miles to St. Louis, the nearest city. The line between counties passes nearby, which can change who manages the water.

• Where to Fish on Auxiliary Reservoir

  No figure exists for depth, so let the water show you. The old creek line under the surface is the feature worth finding. Rip-rap along the wall holds fish that the open bank never does. Public occurrence data for Jefferson County names green sunfish, bluegill and white sucker. What holds for the county may not hold for this water. Fish Auxiliary Reservoir to its features, not to its size.

• Seasonal Patterns

  The range across the year is 30°F to 78°F. The freeze here is occasional rather than annual. It should never be assumed safe, whatever the month says. Spring and autumn carry the year; summer squeezes it into the ends of the day. It sets the rhythm of the year at Auxiliary Reservoir.

• Tackle & Baits

  Whether the bank is open is not something our records settle. Mapping is blank for access, so scout the approach before committing the car. Largemouth respond to soft plastics tight to cover; go weedless where the growth is heavy. Local rules can differ across the county line, so check where you stand. Some water is controlled locally without a sign saying so. East Lake Impoundment at 0.6 miles is the sensible second choice. Confirm before you fish Auxiliary Reservoir.