The last few years, I have run with just plain shoes, however, figuring that slipping is to be expected when running on snow. Also, the yak trax sometimes slip off your shoes (unnoticed to you) and so it is easy to lose them when running. With my current hamstring problem, it seems like any slipping is making it worse so I have been thinking about using the Yak Trax again. Well, in something approaching serendipity, my running buddy Dan Vega was helping me deliver and install some library cabinets and shelving at a home near here. While we were working, the homeowner was surfing the web and chatting with us. She had taken a bad fall that morning on her driveway and had stumbled across a webpage describing "screw shoes" and was asking us if we ever used them (she knew we were both runners). I walked over to her PC and she was looking at this page. Partway down the page is a photo of Dan drilling sheet metal screws into my running shoes! Here is the photo:
This photo was taken in probably 1999 at an Incline Club run. Anyway, it convinced me to go back to this old, low tech approach to winter running for this weekend's snowy run.
If you want to give this a try yourself, Matt's page (linked above) gives all the details.