With some members of the (now defunct) ISU Mountaineering Club, backpacked into RMNP and dug a HUGE snow cave with my friends (8 of us). Got some winter mountaineering lessons from Colorado Mountain School, guide was Harry Kent (1st American winter ascent of the Eiger), learned how to ice climb, build snow bollards, read avalanche signs, etc. Later attempted to climb Longs Peak -- but got turned back. Fun times.