It’s back… Shell’s Ski Free program for BOGO lift tickets to Copper Mountain, Crested Butte, Monarch or Powderhorn. Here’s how it works. 1. Stop by any participating 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. 4. Take the validated, stamped voucher and gas receipt to the participating ski area’s lift ticket window. 5. Purchase a one-day, full-price adult lift ticket and receive a second one FREE. (Both tickets must be used on the same day). The program runs through April 19 or until ski areas close for the season. Each participating resort has some restrictions and/or blackout dates so be sure to check your favorite before heading out.