Groomed tonight. Very warm Tuesday and very cold yesterday so trails were icy. Broke up the surface of skating lanes, left much of the diagonal track alone because tearing it up and trying to get a deep set track would have been very difficult. Did fix diagonal track in some areas like north edge of Minears Field. Skiing should be good, will ski tomorrow and give a report. Also, opened the Hill Trail. River trail still closed because of a large ice area.