Highway 395 has reopened with a pilot car escorting motorists through the smoky Pine Nut Mountains this morning.The Carter Springs Fire has grown to more than 2,000 acres and cost $500,000 to fight, according to an update issued this morning by Sierra Front Interagency Dispatch Center.The cause of the fire remains under investigation.Flames were visible through the night from Carson City and Carson Valley.The fire, which started around 12:30 p.m. Friday, is burning in pinon-juniper woodland east of Highway 395 about two miles south of Ray May Way. The cause is still under investigation. Sierra Front estimated containment at 5 …