Royal Gorge XC has finally made it's opening thanks to it's ability to make snow. Royal Gorge boasts 150 kilometers of trails, but only 10 kilometers are open at this time. The special "early season" price for a trail pass is $20 dollars.
Beginning January 5th, Royal Gorge will have dog friendly trails. You will be able to take your dog on select trails (off leash) on Mondays, Tuesdays, and Thursdays. Sorry, no dogs in the day lodge.
As for the other guys:
Tahoe Donner XC: Not open. 530-587-9484
NorthStar XC: Not open. Guided snowshoe tours only. 530-562-2218
Tahoe XC, Tahoe City: Not open. 530-583-5475
Squaw Creek XC: Not open. 530-583-6300
Spooner Lake XC: Not open. 775-749-5349