Mammoth Mountain, California will be open for skiing and riding this Memorial Day Weekend, but we all know that's not new.

However, what is new is that Mammoth is opening all of the summer activities - mountain biking, golfing, climbing wall and kids zipline - on Memorial Day Weekend.  This means that $99 buys you 9 holes at Sierra Star golf course and unlimited skiing, snowboarding, and mountain biking at Mammoth.

Mammoth will offer lift access out of Main Lodge from 7:30am - 2pm through Monday, May 28. The Bike Park will open the lower-mountain trails on Saturday, May 26 and Sierra Star has been open since May 18th with the tees, greens and fairways of this championship course in great shape.

Mammoth is also hosting the annual Memorial Day Madness on the Main Lodge Sundeck and at the all-new Yodler BierGarten along with the Luau Pig Roast and beer tastings.

More Information: Mammoth Memorial Day Madness

Read More: Mammoth Mountain

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It's almost time for skiing at Chile's historic Ski Portillo resort and Portillo's ski season is set to begin on June 16, continuing through October 6.

A ski vacation to Ski Portillo, Chile is a unique experience.  The oldest and most exclusive resort in South America, Portillo combines old-world elegance, breathtaking scenery and epic skiing, all in an intimate resort that accommodates only 450 guests a week.

This is a good time to book, with special offers already available.  For reservations, call 1-800-829-5325, or email reservas@skiportillo.com.  More information on Ski Portillo is also available at www.SkiPortillo.com.

Read More: Skiing in Chile | Skiing in Argentina

_{Skiing at Ski Portillo, Chile Photo Copyright Jonathon Selkowitz}

If you're anything like me, you probably have a bunch of old ski equipment that you haven't used in a while.

You don't need to waste money or storage space by letting your equipment sit uselessly in the back of your closet or in a corner of your garage.

In fact, your used ski equipment might actually garner you some cash that you can put towards a new pair of skis or boots.   Another option is trading in your gear if it's in good shape and there are good deals out there on this season's gear.  Here's how to sell used ski equipment.

Read More: How to Donate Ski Equipment

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Sun Valley is located in Sun Valley, Idaho, is great mountain for all level skiers. Sun Valley has something for everyone - Dollar Mountain, called "the finest teaching mountain in the world," is a great place for beginners, and intermediates will love Warm Springs. Everyone (including advanced skiers) will love River Run's variety of terrain.

Sun Valley is also perfect venue for a summer vacation, offering nearly 28 miles of hiking and biking trails on beautiful Bald Mountain and horseback rides on scenic Dollar Mountain.

The Sun Valley area is is full of charming yet sophisticated shops, restaurants, galleries, theaters, and attractions.

Here's more on Sun Valley summer vacations and summer activities.

Related: Sun Valley | Mountain Resort Vacations

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