What You'll Find at Mallard Lake Forest Preserve

Mallard Lake Forest Preserve sits in DuPage County west of Chicago and holds a 45-acre lake stocked with largemouth bass, bluegill, and channel catfish. The preserve is day-use only, with parking, a boat launch, and fishing access from shore and by boat. It's a straightforward destination for anglers within an hour of the city who want to fish without traveling far into rural Illinois.

The lake itself is shallow to moderate depth, typical of glacial impoundments in the Chicago region. Water clarity varies by season—better in spring and fall, cloudier in summer when algae blooms are common. The shoreline is a mix of open bank and wooded edges, with some cattail beds along the north side that hold bass and panfish.

Key Takeaways

  • Mallard Lake holds largemouth bass, bluegill, and channel catfish in a 45-acre lake accessible by boat and from shore.
  • A boat launch and parking are available; the preserve is day-use only with no overnight camping or facilities beyond restrooms.
  • Spring and fall offer the clearest water and most predictable fishing; summer algae blooms can reduce visibility and fish activity.
  • A valid Illinois fishing license is required, and DuPage County Forest Preserve rules prohibit live baitfish and restrict certain tackle types.

Seasons and What to Expect

Spring (April through May) is the most productive season. Bass move shallow to spawn, and bluegill are aggressive. Water temperature climbs from the low 50s to the mid-60s, triggering feeding. Catfish also become active as the lake warms. Expect crowds on weekends, especially after the first warm spell.

Summer (June through August) brings algae blooms that cloud the water and reduce oxygen in deeper zones. Bass retreat to deeper structure and shade. Early morning and evening fishing is more productive than midday. Catfish remain catchable throughout, especially at night. The preserve can be busy with non-fishing visitors on hot weekends.

Fall (September through October) clears the water as temperatures drop and algae dies back. Bass feed heavily before winter, and bluegill are still present. Water temperature falls from the 70s to the 50s. This is often the second-best season after spring. Fewer crowds than summer make it a quieter time to fish.

Winter (November through March) slows fishing significantly. The lake does not typically freeze solid enough for safe ice fishing. Shore fishing is possible but slow. Most anglers skip this season or fish other nearby lakes.

How to Fish Mallard Lake

From shore, work the wooded edges and cattail beds with topwater lures or soft plastics for bass. Bluegill respond to small jigs, spinners, and live crickets or waxworms fished near vegetation. Catfish are best caught at dusk or night with chicken liver, cut shad, or commercial stink baits fished on the bottom.

If you bring a boat, focus on the deeper center of the lake and any submerged structure you can identify. Bass suspend in the middle water column during summer heat. Trolling crankbaits or casting jigs around the perimeter is effective in spring and fall. The north end near the cattails holds panfish and smaller bass year-round.

DuPage County Forest Preserve rules prohibit live baitfish (minnows, shiners, shad) but allow dead bait and artificial lures. Check current regulations before your trip, as rules can change. A valid Illinois fishing license is required for anyone 16 and older.

Access, Parking, and Facilities

Mallard Lake Forest Preserve is located at 2S571 Naperville Road in Wheaton, Illinois. Parking is free and available in a small lot near the boat launch. The preserve is open dawn to dusk, day-use only—no camping or overnight parking.

A concrete boat launch accommodates small to medium boats. Restrooms are available but are basic seasonal facilities. There is no bait shop, concession stand, or rental equipment on-site. Bring everything you need: tackle, bait, water, and snacks. The nearest gas stations and bait shops are in Wheaton or along nearby roads.

The preserve is accessible year-round, but winter weather can make parking and launch conditions difficult. Call the DuPage County Forest Preserve District at 630-933-7200 to confirm conditions before a winter trip.

Regulations and Licensing

Illinois fishing licenses are required for anyone 16 and older and are sold online through the Illinois Department of Natural Resources website, at bait shops, and at some sporting goods stores. A one-day license costs less than a full-year license and is a good option if you fish only occasionally.

DuPage County Forest Preserve rules specific to Mallard Lake prohibit live baitfish but allow dead bait and all standard artificial lures. Bass have a 12-inch minimum length limit with a daily bag limit of five fish. Bluegill and other panfish have no minimum size but a daily limit of 50 fish. Catfish have no size limit and a daily limit of 10 fish. These limits reflect Illinois state law; confirm current regulations with the IDNR before fishing.

Catch-and-release is encouraged, especially for bass. The lake benefits from anglers returning smaller fish to maintain the population.

When to Fish and Crowds

Weekday mornings, especially in spring and fall, offer the best combination of fish activity and fewer people. Weekends draw families and non-fishing visitors, particularly in summer. If you prefer solitude, fish Tuesday through Thursday in early morning or late afternoon.

The first warm days of spring (late March and April) bring crowds of anglers eager to fish after winter. If you want to avoid the rush, wait until mid-May when the initial spawn is over and the lake settles into a more predictable pattern.

Nearby Alternatives

If Mallard Lake is crowded or conditions are poor, several other DuPage County Forest Preserve lakes are within 20 minutes. Busse Lake (in Elk Grove Village) is larger and holds similar species but can be busier. Blackberry Lake (in Warrenville) is smaller and shallower, good for panfish and beginning anglers. Springbrook Lake (in Naperville) is another option with bass and bluegill.

For a different experience, the Des Plaines River runs through several forest preserves in the area and holds smallmouth bass, catfish, and panfish. River fishing requires different techniques but offers more solitude than the lakes.

Frequently Asked Questions

Can I fish Mallard Lake at night?

Night fishing is not permitted at DuPage County Forest Preserve properties. The preserve closes at dusk. Catfish fishing, which is often best at night, must be done during daylight hours or in the early evening before closing.

Is there a launch fee for boats?

No launch fee is charged. Parking and boat launch access are free. You do need a valid Illinois fishing license and must follow all DuPage County Forest Preserve rules.

What's the best bait for catfish at Mallard Lake?

Chicken liver, cut shad, and commercial stink baits all work well. Fish on the bottom in deeper areas during late afternoon and early evening. Catfish are less picky about bait than bass, so experimentation is less critical.

Can I use a kayak or canoe instead of a motorboat?

Yes. Kayaks and canoes are permitted and launch from the same ramp. They're a good option if you want to fish quietly and avoid fuel costs. The lake is small enough that paddling to any area takes only a few minutes.

What should I do if I catch a large bass?

If you want to keep it, measure it to confirm it meets the 12-inch minimum. If you want to release it, wet your hands first, handle it gently, and return it to the water quickly. Catch-and-release helps maintain the bass population for future fishing.