Due to warming conditions, Vilas County is closing most of its snowmobile trails in the southern two-thirds of the county today at 8:00 a.m. This closure includes the Arbor Vitae, Conover, Eagle River, Lac Du Flambeau, Manitowish Waters, Phelps, and St. Germain systems. The Boulder Junction, Land O’Lakes, Presque Isle, and Sayner systems will remain open. Vilas County is currently the only area in Wisconsin with open snowmobile trails, but all trails will close regardless of conditions on March 31st. Trail users must stick to open trails and may encounter gated sections in closed areas.