Virgin Trains is building a high speed rail link between !SoCal and #Las_Vegas, #NV. They plan to end it North of the Cajon Pass. That may be because of problems acquiring rights-of-way there.
I just think that not extending the line to Ontario International Airport (ONT) in Ontario, #CA, is likely to doom the train to low ridership. If I'm driving from #Los_Angeles, by the time I get to the Mojave Desert, I've already spent half of the time it takes to get to Las Vegas. Am I then going to pull into the park and ride and hop on the train? I just do not think most people will do so.
The extra hour of drive time is probably the difference between driving or hopping on a train.
NOTE: I'm in favor of the high speed rail link. I just think they need to extend it, so that the SW terminus is closer to most of the people who'll ride it.