Lakeside 1 Our Facility Lakeside provides 64 bed single occupancy rooms specializing in mental health. Each of the four houses have 16 rooms, a large common area, kitchen and dining to create a nice home atmosphere. The large courtyard provides socializing and outdoor activity. The recreational room within the courtyard is equipped with exercise equipment, pool table and space for games and crafts. Click to View Images Our Location605 Joseph Ave, Winchester ID 83555 Winchester, Idaho has the small town comfort feel, with the Winchester State Park providing the enjoyment of fishing and walking. There are many activities available at our location and surrounding areas that are overseen by Lakeside Employees.