Industry leaders say that even though last-minute lift tickets at some resorts now exceed $100, skiing has never been more affordable if you're savvy about discounts. The percentage of people who participate in snow sports with household incomes over $100,000 has risen over the past eight seasons from 45 percent of ski area visitors in the 2006-07 season to 56 percent of visitors in the 2013-14 season, according to the report. Evan Reece, co-founder and CEO of San Francisco-based Liftopia, an online marketplace for lift tickets, says buying early and booking multiple days also goes a long way in lowering the price of getting on the mountain. [...] while large resorts like Vail, Breckenridge and Keystone offer varied terrain and more amenities, smaller resorts can provide their own charm, shorter lift lines, less crowded slopes and cheaper lift tickets. CJ Hartland, sales manager for Monarch Mountain in southwest Colorado, says the resort's owners have kept lift ticket prices down by offering group rates and free skiing to kids age 6 and under and to seniors 69 and over. At larger resorts, keeping skiing affordable has come down to an intense battle over season pass prices. [...] 2009, an unrestricted pass to Vail Resorts at Vail Mountain, Beaver Creek, Breckenridge and Keystone cost $1,900.