The rasputitsa is a muddy season that happens twice per year in West Russia, Ukraine, and Belarus. It happens in mid-October to late November due to rains, and mid-March to late April due to thaws (according to the Russian wiki page with google translate). These conditions make travel by dirt road almost impossible, as made famous during WW2.
What I'd want to know is, does Siberia and Canada also have rasputitsas? If so, what times of the year do they occur? and are they comparable to the West Russian one?
Edit: I should have specified this, but Siberia and Canada are large places. I would guess there's an arctic limit somewhere, to the north of which never gets muddy since it's always too cold. So I guess what I'm asking is, what regions of Siberia and Canada have rasputitsas (if any)?