This is Trolleyland Electric Railway. It seems to have been in existence from about 1963 to about 1973. There is no trace of it today, but the approximate location is marked. It was located north of 183rd Ave and between Case Road and I-5.
They had an electric boxcar, 3 street cars from the British Columbia Electric Railway (Vancouver BC) an switching engine, an electric trolley bus from Seattle and a caboose from the Great Northern Railroad.