Jim, the answer may differ based on the different areas. In some northern areas, deer and elk tend to rut earlier by a few weeks than they do in southern regions. Here in Colorado, the rut will usually get hot and heavy around the 2nd or 3rd week of September.
Hiker is dead on for peak rut in Colorado. It varies by latitude, like whitetail. I'm not for sure, but I believe Montana and Canada are a few weeks earlier (at most) than Colorado and New Mexico or Arizona can be a few weeks later.
Any forum members want to comment on their region?
There is one tip I have learned over the years in hunting whitetails in late season snow. Do not overlook soybeans left standing on the edges of fence rows, woods, creeks, buildings wherever it might be, this is where the deer will be while the food lasts during late season. December/January will pull deer in from some distance away to feed on the easy to get to food.
I killed one of my nicest bucks off of a very small patch of soybeans that was left after rains created a...