WSU Extension > Mason County > Loading view. There were no results found. There were no results found. Events Mason County Extension Office Mason County Extension Office 303 North 4th Street, Shelton, WA 98584, USA Shelton, Washington 98584 United States Get Directions 360-427-9670 Ext. 681 United States Today Upcoming Upcoming Select date. Previous Events Today Next Events Subscribe to calendar Google Calendar iCalendar Outlook 365 Outlook Live Export .ics file Export Outlook .ics file