By Shereen Siewert Two additional snowmobile trails in Lincoln County are now open, according to the county’s Forestry, Land and Parks Department. Zone 3 and 4 of the trail system opened early Thursday. A portion of Zone 1 opened earlier in January. Zone 1 trails remaining closed west of Tomahawk are as follows: Corridor 19 south of Highway 86 and Trail 86 south of Hwy 86 and Corridor 17 south of the Park and Ride at intersection #30. Zone 2 trails remain closed. All trails are closed to winter ATV use when the temperature is above 28 degrees.