I'm guessing it's the Lake Arnold Trail to Feldspar that you are asking about? If so, it's not closed. But do expect to get wet feet, even in this dry year. And also expect to get VERY wet if you are not alert to the "flipping bridge" ****y trap - one of the plank bridges there will flip over when you step on it, and dump you wholesale into deep water, if you are not very alert. (This trail follows an old route right through the middle of a deep swamp, and badly needs to be rerouted; but it is open for use.)
The bushwhack between Marcy and Gray should not be used. It's not a great route in the first place, but more importantly DEC has asked that it not be used because of the damage it causes to high elevation vegetation. There is (was?) a sign on Gray asking people not to use that route.
If you don't mind a little extra vertical, the cleanest way to do these three together is to go in and out over Marcy.