John's Lake overview on the Wisconsin DNR website: "Johns Lake is a 71 acre lake located in Waushara County. It has a maximum depth of 41 feet. Visitors have access to the lake from a public boat landing. Fish include Panfish, Northern Pike and Trout. The lake's water clarity is very clear."
John's Lake Association -- information on water quality, fish surveys, and more
John's Lake Public Boat Access
Contour (bathymetric) map of John's Lake
Wautoma (15 min drive)
Redgranite (15 min drive)
Wild Rose (20 min drive)
Coloma (30 min drive)
Berlin (35 min drive)
Princeton (40 min drive)
Waupaca (40 min drive)
Oshkosh (1 h drive)
Appleton (1 h 10 min drive)
Wisconsin Dells (1 h 15 min drive)
Baraboo (1 h 20 min drive)