"Snowbeast" -- http://us.imdb.com/Title?0076731
With the added tie-in of having Clint Walker starring as the sheriff.
He was the one who was almost killed when his ski pole impaled him,
penetrating his heart.
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That happened at Mammoth Mtn, IIRC.

TCS (The Colorado Skier)
A-Basin is still open for skiing!