Lake Levels

Wonder Lake was designed with a “run-of-the river” dam spillway, where all flow leaving the lake cascades over a concrete spillway with a fixed (non-adjustable) weir. This weir elevation is fixed at 803.0 feet above sea-level.
Lake Status

The Fight Against Invasive Species

The Wonder Lake Master Property Owners Association is reminding boaters, anglers, and water skiers to remove, drain, and dry after a day on the water to prevent the spread of invasive species. These Be a Hero—Transport Zero™ steps can now be found at 14 boat ramps around the Illinois private lake.
Lake Status

Hackmatack National Wildlife Refuge

The Hackmatack National Wildlife Refuge is a newly established United States national wildlife refuge that will include noncontiguous properties, especially tallgrass prairie patches, wetland properties, and oak savanna parcels, located in the northwestern region of the Chicago metropolitan area and the southern part of the Milwaukee area.
Lake Status

Managing Dead Carp

Subdivision and lakefront properties can experience a significant die-off of carp in the spring or early summer, which can occur on other area lakes as well.

Lake Status

Newsletters

About the MPOA

Monthly newsletters will keep you up to date on the activities on and around Wonder Lake.

March 2026 newsletter

A note from MPOA President Ray O’Brien 
Welcome to spring! MPOA directors voted in the February meeting to increase the cost of the lake use stickers. Most of the increase was a direct result of Federal and Illinois laws preventing charging convenience fees on debit card transactions, and for your convenience we have decided to continue to accept credit card payments. There is no prohibition however on offering a discount for cash/check payment, so there will be a $5 per decal discount for cash or check payments.

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M.P.O.A. Bylaws

ARTICLE I  
Section 1. The name of this corporation shall be MASTER PROPERTY OWNERS’ ASSOCIATION, INC. FOR THE WONDER LAKE, ILLINOIS AREA. (Revised 9/13/2023) Section 2. This Corporation (hereinafter referred to as the M.P.O.A.) is an Illinois not for profit corporation, chartered by the Secretary of State on September 18, 1965, as provided by the General Not For Profit Act of Illinois, approved July 17, 1943, in force January 1, 1944.

About the MPOA

Wonder Lake Homeowner Associations

With the exception of property located in the Oakwood Shores and Hickory Falls #3 subdivisions, the MPOA does not collect annual dues from the individual owners of properties with deeded access to Wonder Lake. Information regarding status of annual dues and fees on any specific subdiviision properties can only be obtained from the Secretary of the subdivision where that property is located.
About the MPOA
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