Around Exit 35 on Interstate 66 westbound, the landscape opens up. Ahead are the Blue Ridge Mountains, and lining the highway are green hills. By Exit 6, the ambiance is pure country. That’s the exit and the setting for the 900-acre Trilogy at Lake Frederick, in Frederick County, Va., a community of single-family houses, for adults 55 and older, by Shea Homes. The name is evocative of resort living for the retirement set, and residents are called members. Click here for the full story.