Public Health Seattle King County (PHSKC) investigated an outbreak of gastroenteritis with vomiting, nausea, and diarrhea associated with Small Frye's restaurant located at 4225 Preston Fall City Road SE in Fall City, Washington. As many as 4 people became ill after eating at the restaurant on February 18, 2016. There was no laboratory confirmation of the etiology but symptoms were suggestive of norovirus. The exact food item that caused the outbreak was not identified. After a field inspection by PHSKC Environmental Health staff, several factors that could have contributed to the outbreak were identified. These included an ill food worker on the premises, inadequate handwashing and inadequate handwashing facilities.