I own nearly three hundred acres of property in Northern Michigan, almost surrounded by state land. On the northern portion of my property is a 20 acre lake which lies entirely on my property. I found out last summer that someone had been cutting across my property from the adjoining state land to swim in my lake. I warned him away, he apologized and said he thought it was state land, and now he is claiming prescriptive easement rights to continue the use of the trail and my lake. I thought you had to "knowingly" trespass to gain a prescriptive easement? I have not been served any papers, just trying to find more information. Thanks.