Colorado has plenty of relatively safe winter peaks. Some ideas include:
near RMNP - Deer Mtn, Twin Sisters, Flattop Mtn/Hallett Peak
14ers - Quandary, Sherman are about the easiest in winter
12ers/13ers from high TH's - Sniktau, Grizzly, Co Mines/Eva Flora, Stanley/Vasquez, Pennsylvania
nice warm up - 11er Chief Mtn
that should get you started ....