Wasco County officials say the largest wildfire sparked by more than 800 lighting strikes Monday night has grown to at least 3500 acres. Lisa Clark with the Central Oregon Interagency Dispatch Center in Prineville says it’s east of Highway 97 in southern Wasco County on private and BLM land. It’s burning in a very remote area; but, due to the fire's location and firefighting traffic, Tuesday ODOT closed State Highway 293 from the junction with Highway 97 east to Antelope.  Drivers going to Antelope or farther to Fossil are urged to take Highway 218 south from Shaniko.