Yes, the Cascade Range is located along the boundary of the Juan de Fuca Plate and the North American Plate. This region is characterized by a convergent plate boundary where the Juan de Fuca Plate is subducting beneath the North American Plate. This subduction process leads to the formation of the Cascade volcanoes, such as Mount St. Helens, Mount Rainier, and Mount Hood.
If you look at a globe or a geological map, you would see this boundary represented, typically marked by features such as deep ocean trenches and volcanic arcs, which in this case correspond to the Cascade Range itself.