Fill up with 10 gallons of fuel at a participating Shell station, and get a SKI FREE voucher redeemable for one FREE lift ticket with purchase of a full price adult lift ticket at participating ski resorts. JUST FILL UP, BRING YOUR RECEIPT INSIDE THE STORE, AND RECEIVE YOUR SKI FREE VOUCHER! SKI FREE offer is valid January 6 April 21, 2014, or until resort closes for season or otherwise noted. Read offers closely for specific resort restrictions. One voucher per fuel purchase.Limit one voucher per visit.