Sales of snowboards and snowboard equipment have slipped 21% over the last four years, while sales of skis have climbed 3% in the same period, according to SnowSports Industries America, a trade group that tracks the $3.5-billion snow sports and apparel industry.

Baby boomers aren’t the only ones bailing. Last season alpine skiing replaced snowboarding as the most popular snow sport among kids ages 6 to 17, according to the trade group. That’s the first time in nearly a decade and a troubling sign for snowboard makers battling for a key demographic.

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