Jan 08, 2018· Unfortunately, the Ski Free Deal will NOT be happening in 2019. Ski Free program for BOGO lift tickets to Copper Mountain, Powderhorn, Sunlight Mountain or Crested Butte. Here's how it works: 1. Stop by any participating Exxon, Mobil or Shell gas station. 2. Pump 10 gallons or more; 3. Ask the station attendant for a validated SKI FREE voucher and to stamp your gas receipt.