I drove up to the DNR Boomsite launch north of Stillwater and there were a couple of kayaks paddling around in the bay. There was still some light ice off the boat launch but you could probably break it open to get into the bay and out to the main channel. Those kayaks looked cold!! I’m not sure that is a comfortable way to enjoy early season open water.
You could probably get a boat out to the main channel with some effort. A few more warm days should open up the Boomsite Bay completely and then you can make the main channel pretty easy. The river’s main channel looked open as far as I could see up towards the high bridge.
The river was froze in from about Stillwater Marina downstream to Hudson. We have a ways to go on that ice – it is going to be a while yet for the Lake St Croix to open up.