On the Road with "Roll Call Alaska 2013"......

I'm remembering that a friend was slowed by snow through Banff & Jasper National Parks during one September too (last year or year before). I think the Icefields Parkway (runs between Banff & Jasper) was closed for a short period due to the snow when he was there but he waited for it to melt and then continued with his plans to drive it.