I have no idea if they are grooming this trail but they reshaped the RR grade this past summer and added a new culvert.
Rockland Culvert Project Update: Route is open for use!
MI-TRALE has announced that the Rockland Culvert Project is completed on the Ontonagon to
Rockland Multi-use Route. This project replaced a failed cast iron culvert with a new concrete
6’X120’ culvert. This was a major project costing nearly $140,000. This funding comes from our
ORV license fees, and is another example of how these fees are used to support our recreational
sport. As you ride this section of trail, take a moment to appreciate the effort required to complete
this project.
North Country Snowmobile Club is very good at posting what they've groomed, when, and the current conditions of their trails (which include the grade you're asking about). northcountrysnowmobileclubup.com