Deputies say the robbery happened at around 8PM Monday night at the Dayton Valley Corner Store which is located on 409 Dayton Valley Road.
According to deputies the suspect jumped the counter, demanded money from the clerk and got away with about $200.
It's unknown where the suspect ran off to but deputies say the suspect is described as white male, 5'5" tall, about 150 pounds and was last seen wearing a black hat, a black sweatshirt with the words "city" on the front, light blue jeans and light colored shoes. The suspect was also wearing a black ski mask or bandana over his face with black gloves.
If you have any information please call the Lyon County Sheriff's Office sub station in Dayton at 246-6200 or Secret Witness at 463-5251.