Juan de Fuca Canyon (image) University of Washington Caption The Juan de Fuca Canyon reaches the opening of the strait that separates the US and Canada. It's just under 4 miles wide and at least 450 meters deep, or twice the depth of the surrounding seafloor. Credit Google Maps Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.