Traveling to Torres del Paine National Park via land…is it feasible?

I would like to travel from Bariloche Argentina (or Osorno, Chile) to Torres del Paine national park via land. How long would this take? What cities and towns do I need to set as destinations?

Your best bet is to first get to Puerto Natales, then head onward to Torres del Paine. This can be done by bus or private car.

Getting To and Away from Torres del Paine:
http://www.vivatravelguides.com/south-america/chile/southern-patagonia-and-tierra-del-fuego/magallanes/torres-del-paine-national-park/torres-del-paine-overview/torres-del-paine-getting-to-and-away