Lakeside East 1 Our Facility Lakeside- East provides 24 single occupancy rooms specializing in mental health. Additionally, Lakeside-East offers 12 single occupancy rooms in a secured memory care unit. The building has large common areas and dining spaces for both sides of the facility. The front patio area supplies space for comfortable lounging outdoors. Click to View Images Our Location605 Nezperce 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.