Welcome to the Springs!
Most of the Ark is runnable though I haven't heard about the Numbers yet. It's low (of course) but still fun with Brown's being the best run for your money considering sun, temps, rapids.
Lower South Boulder had a release a couple of weeks ago though it's too low now.
Haven't heard about Westwater yet but it's an early season run.
Shoshone yes, but it's a long drive for a short run.
The Colorado above the confluence with the Eagle is easy but scenic with some decent play and lots of options regarding length. I doubt (but don't know) that it's iced up.
I've talked to folks who run Cataract Canyon in March for an easy permit, multi-day.