According to Mitch Wright, the kart track will be open so long as it has no snow. Currently the kart schedule doesn't list anything for that weekend, though I'd want to confirm that with Mitch. If the weather is sunny and at least warmer than 50F, it should be good for karting. I was there in just a long sleeve t-shirt and high 60F and was just fine.

Cost is $55 for 1/2 hour.

<img src="http://watkinsglen.bverticals.com/pictures/040117%20Germany%20%26%20Austria/cart.jpg">

<img src="http://watkinsglen.bverticals.com/pictures/040117%20Germany%20%26%20Austria/studdedcart.JPG">

although he was the only one who bumped people off track during our session :)