I hope there is additional info coming regarding a gravel route, its one of my favorite features of the ride. While a gravel rail trail bike path would be doable for the amount of traffic on past gravel routes (I would estimate a density of fewer than 10 riders per mile in past years) it is less than ideal from a riding viewpoint. Additionally, the Three rivers trail goes to the southeast from Rolfe while the rest of the ride goes to the north. It would be a significant increase in mileage to make that route work.