REI and RAGNAR are sponsoring a Night Run to benefit the American Hiking Society. There are a million and one reasons not to run on Jan. 31. It's cold. It's dark. Your heater and fuzzy slippers are calling your name. But we're asking you to put your 'buts' behind you, and join us as we host REI's No Buts Night Run. Go to nobutsnightrun.com for details.