 They mainly concern themselves with the part of the river below Walnut Hills campground, on down to Owosso.The Keepers of the Shiawassee are a new group that has grown out of the efforts started by Headwaters Trails, Inc. in Holly that created a paddling trail along the river from Holly to Fenton.The Keepers organize and link volunteers in Genesee County to continue the creation and evolution of a navigable river throughout Michigan.