If it's the sole that's broken and the rest of the boot isn't too worn, you can get the boot re-soled with good results. I had a backcountry ski boot break like that once, probably in transit from rough handling and packing, and it was like new once I got a new sole on it. Well worth it on an expensive boot.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett