Lake Thirteen is an artificial public lake, located in Surrey Township, Clare County, Michigan. The lake spans about , and reaches a maximum depth of approximately .
The lake serves recreational purposes such as watersports and fishing. In most fishing handbooks, the primary fish is listed as bullhead, but largemouth bass and northern pike can also be caught in the lake. In 2002 walleye were planted in the lake, although there have been no reports of consistency in catching them.
The lake was dug on the creek bed of Runyan Creek, which flows into the lake and is the primary water supply. The water depth varies, anywhere from in some areas, to a maximum of . According to an article published in the local newspaper at the time, the lake was formally named Lake 13 by Herschel and Velma Reiss because it is situated in Section 13.