In Michigan the speed laws for snowmobiling are as follows;
 
324.82119 Operation of snowmobiles prohibited; exceptions; permanent prohibition; requirements; rules.

Sec. 82119.

(1) A person shall not operate a snowmobile upon a public highway, land used as an airport or street, or on a public or private parking lot not specifically designated for the use of snowmobiles except under the following conditions and circumstances:

(a) Subject to subsection (2), a snowmobile may be operated on the right-of-way of a public highway, except a limited access highway, if it is operated at the extreme right of the open portion of the right-of-way and with the flow of traffic on the highway. However, a snowmobile may be operated on the right-of-way of a public highway against the flow of traffic if the right-of-way is a snowmobile trail that is designated by the department in the plan developed pursuant to section 82106(2) and that is approved by the state transportation department. Snowmobiles operated on the right-of-way of a public highway, as provided in this subdivision, shall travel single file and shall not be operated abreast except when overtaking and passing another snowmobile. In the absence of a posted snowmobile speed limit, a snowmobile operated on the right-of-way of a public highway, as provided in this subdivision, shall not exceed the speed limit posted on the public highway.

Sec. 82126.

(1) A person shall not operate a snowmobile under any of the following circumstances:

(a) At a rate of speed greater than is reasonable and proper having due regard for conditions then existing.

DNR law has been known to write tickets for speeding on frozen lakes using the 55 MPH highway speed using the lake surface as an extended highway if there is a public access.

Other than that we do not have a posted speed limit on trails, it's up to the law to prove that you were operating At a rate of speed greater than is reasonable and proper having due regard for conditions then existing.


Clear as mud eh!
 
Bill Manson
Executive Director
Michigan Snowmobile Association
616-301-2743