Our local mountain Eldora Mountain Resort, just outside of Boulder announced a limited Ski Free program and promotion. Bring a season's pass or lift ticket from another area and receive a one time free lift ticket. Once redeemed you can also upgrade for a $99 season pass good the balance of the year.
Be sure to check out all the details here - Ski Free at Eldora. Looks like a great promotion and maybe a signal for spring price promotions.