Before the last ice age, which began about 1 million years ago, a large river ran through this area. Many geologists believe it was the ancient Wisconsin River. This large river carved a deep, wide valley into the thick layer of Cambrian sandstone, which was deposited on the bottom of a great inland sea that covered most of Wisconsin over 6 million years ago.
Although this area has been overrun with four distinct giant glaciers originating from Canada, the last of these glacial ice blankets called the Wisconsin Great Glacier did most of the work.
As the glacier retreated, it filled in the Old River Valley with lots of sand, gravel and boulders that dammed the melting ice and formed the famous Four Lakes of the Madison area: Lakes Mendota, Monona, Waubesa and Kegonsa.
This chain of beautiful lakes has only existed during the last twelve thousand to fifteen thousand years and is located on glacial debris many feet above the old, buried valley floor. The four lakes are connected by the present day Yahara River.
The large marsh northeast of the park was part of the lake right after the glacier left this region and for the last 12,000 years it has accumulated sand, silt and marsh vegetation, filling it.
Lake Kegonsa now covers 3,209 acres and its deepest point is 32 feet.
Yarrow or Achilles
I actually saw this spider as I walked the path. It was about the size of a quarter.
About all I know it is in the crab spider family. Freaky!!
There is a dog beach/swim area. The dogs are allowed off leash in the water.
Oreo attemped swimming with mommy holding the harness up.
Breck says belly height is where I draw the line.
Who threw a Frisbie? Daaang! Almost worth learning to swim! I think I will try doggy water wings… surely Amazon sells them, they have everything.
© Ilex – Midwestern Plants