Only ride when it's been dry out for a couple of days, as the wood is VERY slick.
This is neat little trail to ride or lap a couple of times, if you're already in the Girdwood area. It's got some short technical spots with wooden berms and board rides.
At Alyeska, head up to the top of the Bear Cub Quad lift and head left towards the hotel. A little ways down the main ski trail, you'll see the opening in the woods to the right.