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Lake Information

County: GRUNDY

Acreage: 239

Recreational Amenities

Boat Fishing? Yes

Boat Ramps? Yes

Boat Rental? No

Skiing? No

Swimming? No

Camping? No

Mazonia North Unit Lakes

Docs Monster Long Eagle Ponderosa

    Click on area names for a more detailed map.
    Long Lake, Eagle Lake, Ponderosa Lake,
    Doc's Club Lake, Monster Lake

Maps are not intended for navigation.

For individual Mazonia South lakes information click the links below:

Long (Wilderness) Lake

Monster Lake

Eagle Lake

Ponderosa Lake

Doc's Club Lake

There are no zebra mussels in this lake.

Fishing Outlook  ( Full PDF Report )

Click here for a list of all reports.



Fish Status



The Ponderosa Lake bluegill fishery appears to be showing signs of heavy fishing pressure as population parameters were in decline for the 2014 survey.



This species is present in most all of the larger water areas with densities greatest in lakes receiving annual supplemental stockings.


Very Good

Although both white and black crappies are present in the Mazonia impoundments, white crappie are the more common of the two. White crappie collected in the 2014 spring surveys on Bass and Monster Lakes had comparable average lengths which approached 9.5”. Prevalent in most all lakes and ponds, crappies provide much of the early spring action. Crappies are regularly caught through the ice as well.



Flathead catfish are present in Monster Lake and can be caught near the Granary Creek cut-off.



Monster, Eagle and Ponderosa Lakes were surveyed with Monster Lake providing the best bass population per the 2014 fall survey results. Bigger bass are taken each year by anglers targeting the more remote, harder to get to lakes and ponds.



The current state record northern pike was caught from Monster Lake. Larger fish are present in some of the south unit lakes, holdovers from when these lakes were leased by private fishing clubs.



Although present in several of the Mazonia lakes, Ponderosa supports the best population of redear sunfish. In the most recent trap net survey, redear sunfish dominated the collection as a total of 48 were captured ranging from 6.7" to 11.7", averaging 9.9" and 12.5oz.

Location: The South Unit Mazonia Lakes, which includes the Ponderosa, Wilderness and Monster Lake areas, is located in Kankakee County north of County Highway 6 and west of the town of Essex.

Description: Most all of these water areas are typified by steep drop-offs and many have maximum depths in excess of 30 feet with some twice that. Shoreline access to most lakes and ponds is limited by extensive stands of tall reed grass. Gravel ramps are present on Eagle, Ponderosa and Monster Lakes. Gasoline motors are allowed on these water areas and while there are no horsepower limitations, a strict no-wake regulation is enforced. “Belly boats” have become an effective and popular way of accessing and fishing the smaller interior ponds. With the exception of Monster Lake which offers year ‘round fishing opportunity, Mazonia is closed to fishing during upland game and waterfowl season. Following the completion of the hunting seasons, Mazonia reopens for ice fishing dependent upon ice conditions.

History and Status of the Sport Fishery: Habitat enhancement projects have been completed on many of these lakes and ponds. Aquatic vegetation, while present, has not required any active management. Most of the larger water areas contain largemouth bass, bluegill, white and black crappie, channel catfish, carp and various other species. The IDNR presently stocks channel catfish into several lakes on a rotational basis. Redear sunfish have been stocked into Clear Lake and Ponderosa Lake as well. Northern pike stockings into several lakes have generally failed. A walleye stocking program has been approved for Monster Lake with the initial stocking scheduled for 2015. No special mercury advisory or other contaminant-related consumption advisories pertain.

Additional Lake Information: Trolling motor only, except Monster and Ponderosa Lake, which allow gasoline outboards, no wake. Two pole and line fishing only.

Contact Information:
Mazonia/Braidwood State Fish & Wildlife Area
IDNR Fisheries Biologist, Seth Love