Skiers and sliders, you’re going to love this BOGO deal. Starting January 4, 2010, you can get one free lift ticket when you buy another adult lift ticket — just for pumping 10 gallons of gas at a Shell station. That’s 50% off!

This works for skiing at Northstar at Tahoe and Sierra at Tahoe, and ski slopes in a few other states as well. You can even gas up at a Shell station in your home state, and use the voucher for a free lift ticket in another.

Along with the Tahoe, California slopes, the Shell lift ticket discount is also valid for varying dates in Oregon (Hoodoo, Mt. Ashland, Ski Anthony Lakes); Colorado (Monarch Mountain, Powderhorn); more than a dozen ski slopes in Michigan, and a few in Washington and Idaho.

WHAT’S THE DEAL: BOGO (buy one get one free) SKI FREE lift ticket for pumping 10 gallons of gas at Shell Stations.

HOW: Redeem this exchange voucher (click on a state) and carefully follow directions for validation. See skifreedeals.com for details. Here’s the list of participating Shell stations. (Read the fine print carefully for instructions and specific resort restrictions. Then get ready to shred the slopes.)

WHEN: Starting January 4, 2010, for skiing Sunday through Friday, from January 4, 2010 through April 16, 2010 (or until ski areas close for the season), excluding holidays and the blackout dates 1/16-18, 2/13-15.

WHERE: In California – Northstar-at-Tahoe, Sierra-at-Tahoe. Also good at certain resorts in Colorado, Oregon, Michigan and elsewhere, but check specific dates.

Here’s a heads up on even more ways to save at Tahoe

Cheap Tip: We’ll add deals as we find them. Subscribe to Bay Area On The Cheap Updates by Email.

• {NEW} SnowBomb Coupons: You don’t need to be a Snowbomb member to use these coupons: Boreal 2-for-1 Lift Tickets, $39-$47 Value (Expires April 9, 2010); Alpine Meadows March Madness Buy One Get One FREE! voucher, $69 Value; Northstar Coupon for $59 lift ticket, save $20; Sierra $54 lift ticket, save $15; Bear Valley $32 Adult Mid-week Coupon, save $27; Bear Valley $59 Adult Mid-week Lift Ticket / Demo Coupon, $55 Value; Bear Valley $50 Adult Weekend Coupon, save $9; Diamond Peak $9 OFF adult all day lift ticket.
• More Free Coupons - If you’re going to Tahoe, check out all the discount coupons for food, drinks, and spa services at: visitrenotahoe.com/coupons and many more ski Tahoe free coupons at SnowBomb.com, including free lift tickets, free ski/snowboard rentals and tune ups, lodging discounts, dining discounts, and other free stuff.
• Ski 3 FREE Squaw Valley Package - Tahoe’s The Village at Squaw Valley offers a Ski 3 FREE Package includes the 3 nights accommodation and 3 adult lift tickets to Squaw Valley skiing. Rates fro  $119.50. (More package deals available.)
• Sugar Bowl at Tahoe – Free Ski Lesson: If you have a season pass or a qualifying lift ticket, then you can take a free group lesson of any skill level and / or use Sugar Bowl’s standard rental equipment for no charge whenever General Admission (GA) is in effect.
• Bear Valley at Tahoe – Free Lift Ticket: Mel Cotton’s Sporting Goods in San Jose is offering vouchers and coupons for lift tickets to: Bear Valley, Squaw Valley, Kirkwood, Northstar, Sierra. Mel’s is located at: 1266 West San Carlos St, San Jose, CA 95126. Or call 408-287-5994.
• Sugar Bowl at Tahoe – Ladies Ski Clinic Deal: 2-day & 1-day ladies-only camps with focus specially designed for active, energetic women who are eager to improve their skiing and snowboarding skills. Costs only $170. Total value for just one day is over $800 if you were to purchase this separately. Package Includes: Lunch; Yoga; 25% discount at Podium; Productions for overnight equipment wax/tune; 50% off demo skis from the Village Chalet Retail Shop; Free Daily CORE Pass; All Day Instruction; Wine Tasting; Massage/Chiropractic Work. Dates: 3/5-6/10 (chose 1 or both days); 4/3/10 (1 day Easter Spring Fling).
• Squaw Valley at Tahoe – Learn to Ski & Ride Days: on March 7, 2010, first time skiers and snowboarders are eligible for $35 beginner packages that include lift ticket, lesson and equipment rentals.
• Northstar at Tahoe – AMEX $30 Off Snowboard Academy All-Day Adult Lesson: Includes Lodging at Northstar Resort, $30 off an adult, all-day, semi-private Burton Snowboard Academy Package or Burton Snowboard Academy lesson Burton demo equipment and access to the exclusive mid-mountain Burton lounge when you pay with any American Express Card. Download AMEX coupon.
• Northstar at Tahoe – Free Lift Ticket with Child Care: Get a free Adult Lift Ticket with purchase of all day kid’s camp. You have to order by phone at 530-562-2278, and you must mention the offer at the time you make the reservation.
• Tahoe and Beyond – Ski Bus Discount: Save $6-10 on Bay Area Ski Bus to Lake Tahoe Ski Resorts and save $20-$60 on ski trips to Utah and Colorado. Use promo code snowpals at payment checkout. More info at snowpals.org/skibus.html.
• Tahoe REI Lift Ticket Discounts – Beginning December 1, at your local REI store, REI members may purchase adult, all-day lift tickets at a discount for Alpine Meadows, Bear Valley, Heavenly, Homewood, Kirkwood, Mt. Rose, Northstar, Sierra-at-Tahoe, Squaw Valley and Sugar Bowl. A lifetime REI membership is only $20. Also, you can take REI’s free class: Learn How to Tune & Wax Your Skis/Snowboard. (Several Bay Area REI locations and dates.)
• Northstar at Tahoe – Military Appreciation Free Lift Ticket on Sundays: In honor of our service men and women, Northstar Resort is offering active duty military personnel FREE skiing or riding on Sundays. Present your CAC card at Northstar’s Ticket Office for your free ticket. One ticket per person, per day.
• Squaw Valley at Tahoe – Military Ski & Ride FREE: All active duty US Miliatry personnel ski or ride FREE, 6 days a week. Blackout dates include all Saturdays, Dec. 27 – Jan. 3, Jan. 16 – 17, &…; Feb 13 – 14. Just go to the Special Tickets Office and present a valid (not expired) active duty military photo ID and a second photo ID (limit one ticket per person, per day).

*If you’re planning a ski vacation check out the Tahoe hotels.