I'm kind of suprised nobody mentioned this, but we basically have this already, its called Echo Mountain. Still pretty close to the city, cheap, but with elevation to maintain snow.
I'm not a park rat but I would imagine you midwest railsliders would have fun at Echo.
Your idea seems cool but like L-gorge said, theres just too much sunlight and variable temperatures on the high plains. It doesn't get and stay cold here like it does further east.
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