It's all over. Last week was it, and everything dropped out really fast. If you come to Steamboat, bring your tube and you can bump down the Yampa with all the bikini-clad out-of-towners. Cross Mountain will maybe still be going, but it's gonna be low and it's two hours west of the Boat.
Not sure how long you've been boating, but Cross at that level is more fun in a playboat. It's not a creek run. I am sure you can meet up with some folks who know the lines. At lower flows it's got a couple few class IVs and some fun play.