Managed to get a good ride in this morning with Schwalbe Rocket Ron tires on my Scalpel. Most trails had some tire tracks through hard packed snow over crunchy ice. The tires felt and sounded like I was riding through broken glass with the ice surface below the snow, but was able to navigate up and down hills with not too much slipping. The trail between cornfield and pond was flooded so managed to ride on ice that was solid enough to not break through. A lot of ice in some areas so may take some time before the thaw and drainage for drier conditions.