SUMMERLIN LAS VEGAS >> THE VISTAS AT SUMMERLIN >> Portofino at The Vistas Portofino at The Vistas Portofino at The Vistas is a neighborhood within the master-planned community of Summerlin in Las Vegas, NV in zip code 89138. Developed by KB Homes in 2003, Portofino at The Vistas consists of 213 one- and two-story single […]