Our just completed snow season was one of the longest on record. The first measurable snow fell on October 4 in Fargo Moorhead and the last measurable snow locally occurred on April 24 for a total of 203 days between accumulating snow events.
Regionally, that October 4 event dropped over 12 inches of snow into far northwestern Minnesota and then on May 1-3, parts of southern Minnesota recorded over 12 inches of snow. That is the longest period between one foot snow events I could find during any snow season within the state of Minnesota.
Another area that has experienced an exceptionally long snow season has been Anchorage, Alaska. On May 18, the Anchorage airport recorded 0.1 inch of snow, with some parts of the city recording nearly 6 inches from the event that started the day before. Anchorage recorded their first measurable snow back on September 29, meaning there was a period of 233 days between snow events, the longest such period on record for the city.