No, there is not. There are proposals to build one though.
Phoenix to Las Vegas is about 290 miles (465 km).
Phoenix is closer to Las Vegas by 53 miles according to Google Maps.
The driving distance from Las Vegas, NV, USA to Phoenix, AZ, USA is 297mi / 478km
www.mapquest.com
As of 2017, there are no passenger train stations of any kind in Las Vegas.
Hhg
Las Vegas
Charlotte, Atlanta, Phoenix, Las Vegas and Denver.
Phoenix, Arizona is about 287 miles southeast of Las Vegas, Nevada.
Charlotte, Atlanta, Phoenix, Las Vegas and Denver.
Phoenix, Arizona
Miami, Phoenix, Las Vegas