A tourist would agree with you. A local would not.
Big Sky is a destination resort. It's the largest in the US now, but with better lines than Colorado. Cool terrain, but most people are nowhere near good enough to take advantage of much of it.
But big resorts are for the birds. You will spend $500 a night for ski in and ski out. Your stuck up on the mountain in all practicality. The food will suck and cost an arm and a leg. Big Sky is at least an hour and a half from Bozeman in the winter.
Whitefish MT Resort or Big Mountain is less than 15 minutes from town. Awesome restaurants, lots of cool mountain town shops, and one of my favorite breweries (have 2 on tap now at my pub) Jeremiah Johnson. The cost is lower, the lines are shorter, and the powder is better.
Here's lift ticket prices: for the Friday after Christmas
Big Sky:
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Whitefish:
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You will save 4-5 grand going to Whitefish with a family of 4. As for the rankings, well here's what Ski Magazine thinks for 2025:
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All that said. I'm not down on Big Sky, but your idea that it's wayyyyy better is a limited view. If you want the big resort experience, go for it. Beats the Colorado lines for sure. But Whitefish is equally badáss and is much better from families or non expert skiers.
I think for most people on this board you should take Snowbasin over Park City in Utah, Grand Targhee over Jackson Hole in Wyoming, Crested Butte over Breckenridge in Colorado, and Whitefish over Big Sky.... Those resorts are much more aligned with our Mississippi State roots. Hell, come ski with me and I'll make you feel right at home with ski in and ski out tailgating under the blue tent mountain style all winter long.**
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