Waterton is still in. Its at 372 right now:
I'm not too sure how low people run that but this level is still good to go, you'll want to check the gauge though.
If you are willing to drive, you can always run Shoshone. Its in the Glenwood Springs area. Its super short so the advantage is that you can lap it a bunch of times...the disadvantage is that it is super short and you HAVE to lap it a bunch of times, to make it worth your while...Also, that region has been gettin hammered with snow, so the drive might suck over the pass...depends how badly you need to get wet.