Mt. Bachelor is a great place to ski. They definitely have the best snow in the Northwest, best being the driest. The snow pack at the mountain is usually pretty consistent and the season lasts longer than any other mountain except for Mt Hood. You can ski at Mt. Bachelor from November through the end of May.
There's a nice mix of terrain at Mt. Bachelor and something for everyone. Beginners will like the Rainbow and Sunrise lifts the best, intermediate riders will find runs to enjoy on most of the lifts on the mountain, and advanced riders will definitely want to check out Northwest Express lift and the Summit lift.
Mt. Bachelor has been consistently rated one of the best lift systems in the US. The lift lines are usually pretty short and they have lots of high speed lifts to get you up the mountain in a hurry.
Be prepared for severe weather conditions when you visit Mt. Bachelor. From the beginning of the season until about April you can cold weather, a low overcast with low visibility, and high winds. Mt. Bachelor is famous with the locals for reporting "moderate" winds when the wind is blowing 35mph. You'll never ski at an area that is as consistently windy.