Madge Lake is the largest body of water in Saskatchewan's Duck Mountain Provincial Park.

Madge Lake serves as Duck Mountain Provincial Park's central tourist attraction.

The area also provides abundant wildlife viewing opportunities, especially in the immensely large local breeding flock of ducks and other waterfowl.

During this winter season, snowmobile riding and ice fishing are primary recreations on the lake, while the surrounding park has facilities for both downhill and cross country skiing.

The lake is warm enough for comfortable swimming from early July to late August, although hardy souls may extend this season by several weeks.

Some proposed development projects - such as the increase in the number of cottages along the lake's northeastern shore - have been shelved, and probably abandoned.

The lake, being located on a rise of land, has a very small cachement area and so its level is very susceptible to variations in annual rainfall.

The lake is also relatively shallow with a largely flat bottom, making even a small change in water level noticeable at the lakeshore.

While welcome, this rise drowned many young trees along the water edge, particularly on the north shore which became clothed in dead saplings.

Emergent marsh plants (notably Schoenoplectus, Typha, and Phragmites) had also overtaken much shore line with the resubmergence of formerly dry lake bottom.

The once-exposed gravel bar has similarly been resubmerged, becoming a hazard to boating and unfortunately extirpating the colony of common terns and herring gulls that bred there.

The lake water is only very slightly eutrophic (and so can be described as mesotrophic), and is also moderately hard and alkaline, with a limestone-buffered pH of about 8.2.

The lakeshore population of paper birch and trembling aspen is in decline, and deciduous trees are now fairly inconspicuous except in isolated pockets.

Fish species include walleye, yellow perch, northern pike, burbot, and white sucker.