windguru lets you compare three models: 27km GFS, 4km HRW, and 12km NAM. They also do a sane, documented, high resolution altitude extrapolation.
The site is ostensibly for wind surfers and their ilk, but with a ($20/year) paid account you can add your own custom spots (for example pigeon-howser col in the link above). But you don't need a paid account to view everybody's spots, so the more of us that join and add mountain-oriented spots, the more useful it becomes. Also, the dude that runs it is responsive and actively developing.
mountain-forecast.com seems to pretty much be garbage. Probably the easiest way to see this is to watch how frequently they'll tell you a clear day above 2000m has a difference of only a couple degrees between the high and the low. They also don't seem to have any documentation as to what model they're using and what adjustments they make, which doesn't improve confidence.
The best single model hereabouts is probably the uw wrf, which (depending on the resolution) does extend as far as the columbia mountains, but their public interface is comically unusable. It would be easy to code up a more digestible version, but their funders require them to not make anything except those crazy gifs publicly available. Which seems a little weird given that pretty much all of the listed funders are public agencies, sigh.