State Highway 66 is a state highway in the U.S. state of Texas, connecting Garland to Greenville. The route runs roughly parallel to Interstate 30, passing through Rowlett, Rockwall, Fate, Royse City, and Caddo Mills. It also crosses Lake Ray Hubbard twice. It is known locally as Lakeview Parkway in Rowlett and as Avenue B in Garland.

Rowlett is a city in Dallas and Rockwall counties in Texas, United States, and an eastern suburb of Dallas. The total population estimate is 73,270 in 2021. It is a growing, upscale community with nearly $1.5 billion in development in the Dallas–Fort Worth metroplex, located on Lake Ray Hubbard.