Muskoka Post Staff
As per files from Wikipedia
Lake Skeleton is thought to have been formed as a result of a meteorite impact.
About 800 million years ago, an asteroid impact is suspected to have created a crater much larger than the remnant lake. Periods of glaciation since then have removed the original crater, leaving a lake approximately 2.2 miles across and 100 meters deep at its center.
Skeleton Lake is recognized as a suspected impact crater. Ironclad evidence of the impact hypothesis would have been removed during the ice ages, and unless more shock geomorphology is found the crater's origin cannot be certified beyond a reasonable doubt.
Due to the spring fed nature of the lake, the water is exceptionally clear. According to residents of the lake, on calm days it is possible to see up to 30 metres underwater with the naked eye.