Nashoba Valley Ski Area, 79 Powers Rd., Westford (tel. 978/692-3033) has 17 ski trails and a snowtubing park. It stays in business in summertime, too, with 5k races, a volleyball league, paint nights for adults, an outdoor pool, and a tiki bar.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.