Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.73102

Sec. 73102. (1) Except as provided in subsection (4), a person shall not enter or remain upon the property of another person, other than farm property or a wooded area connected to farm property, to engage in any recreational activity or trapping on that property without the consent of the owner or his or her lessee or agent, if either of the following circumstances exists:

(2) Except as provided in subsection (4), a person shall not enter or remain upon farm property or a wooded area connected to farm property for any recreational activity or trapping without the consent of the owner or his or her lessee or agent, whether or not the farm property or wooded area connected to farm property is fenced, enclosed, or posted.

(3) On fenced or posted property or farm property, a fisherman wading or floating a navigable public stream may, without written or oral consent, enter upon property within the clearly defined banks of the stream or, without damaging farm products, walk a route as closely proximate to the clearly defined bank as possible when necessary to avoid a natural or artificial hazard or obstruction, including, but not limited to, a dam, deep hole, or a fence or other exercise of ownership by the riparian owner.

(4) A person other than a person possessing a firearm may, unless previously prohibited in writing or orally by the property owner or his or her lessee or agent, enter on foot upon the property of another person for the sole purpose of retrieving a hunting dog. The person shall not remain on the property beyond the reasonable time necessary to retrieve the dog.In an action under section 73109 or 73110,  1 the burden of showing that the property owner or his or her lessee or agent previously prohibited entry under this subsection is on the plaintiff or prosecuting attorney, respectively.

(5) Consent to enter or remain upon the property of another person pursuant to this section may be given orally or in writing. The consent may establish conditions for entering or remaining upon that property. Unless prohibited in the written consent, a written consent may be amended or revoked orally. If the owner or his or her lessee or agent requires all persons entering or remaining upon the property to have written consent, the presence of the person on the property without written consent is prima facie evidence of unlawful entry.