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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.
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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.
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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.
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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.

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Newsletters

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

Decal notices are being emailed now - note this year we’ve added the option to pay by credit card online. There is a small fee that we are passing through to those who choose to pay by card online but the convenience will be great for us. Please check your estimates to make sure your information is correct and up to date. We need a copy of your new state registration on file if it expired. We also need your signature on the first page of the waiver document, the link is in the decal email you’ll receive. Those who pay online will see that their acceptance of the waiver is part of the agreement in the online payment. Otherwise you can print, sign, take a picture and upload it in your email back - or mail it with payment. Decals will be mailed to you once payment is received. Contact the office with any questions.


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.

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