The specific required insurance varies by state or province. In your place I would go to your local licensing organization web site and look it up. When I travel I carry proof of my insurance so that if I get stopped I get to continue my ride soon after. When I last rode in Ontario I had proof of full coverage in my bike's glove box but was never asked to show it. I was asked for my passport going into Canada and for my green card when I returned to the states.