Park City snow conditions: What skiers & riders can expect during Christmas week Christmas week begins with limited terrain and below-normal snowpack at Park City’s ski resorts, with meaningful snowfall not expected until around Christmas Day, according to the National Weather Service and mountain weather forecaster Chris Tomer. As of Dec. 21, Park City Mountain has 14 of 348 runs open, about 4% of its terrain with a 23″ Base. Deer Valley Resort has 23 of 202 runs open, roughly 11% with a 18″ Ba