I have been tracking down some properties owned and managed by the University of Michigan, Michigan State University and Michigan Technological Univeristy. These include university properties managed as farms, forests, nature reserves, and field-based teaching. Many are open to the public, so this allows greater access to recreational opportunities by having these added and available in OSM.
Other efforts have been to map properties owned by the Nature Conservancy and other land trusts that are open to the public. County Forests, parks, and other local owned public properties are important in my view as well. The MapRoulette challenge for Michigan GNIS nodes by user BBMiller has been a useful tool to focus on those features, particularly the emphasis on adding the GNIS:feature_id identifier which will assist with Wikidata and Wikipedia integration.
I was inspired to create my own MapRoulette Challenge for Michigan GNIS stream and canal points to add the GNIS identifer where missing, as well as build in potential for future automated editingn tools to improve connectivity to wikidata, and just plain add in named rivers, streams, and drains that are missing from OSM, incomplete, or need their ways to be collected into relations.
Upcoming, i am thinking of making another MapRoulette challenge for the midpoints of roads on the Ottawa National Forest- most of those seem to be missing so that would be an opportunity to focus on digitizing and adding those in a high quality level from USGS 3DEP/aerial imagery rather than directly importing.
Just been a lot of fun working on Michigan things and figuring out some routes to improve OSM. See you in the changesets!