The road up Hyalite closes at the end of March, so get there before that if you want spectacular ice. Check montanaice.com for conditions and such. If the weather is nice, there is pretty good bouldering and rock climbing around Butte and Whitehall. Spire rock, Whiskey gulch, homestake pass. You might hit the pre-runoff fishing on the Big Hole, that could be pretty good, too.