Minn. Stat. § 604A.27: DEDICATION; EASEMENT.

No dedication of any land in connection with any use by any person for a recreational purpose takes effect in consequence of the exercise of that use for any length of time except as expressly permitted or provided in writing by the owner, nor shall the grant of permission for the use by the owner grant to any person an easement or other property right in the land except as expressly provided in writing by the owner.