The Canadian Cordillera provides a natural laboratory for investigating the interactions between active plate tectonics, lithospheric evolution, and deep mantle dynamics. Extending from the Cascadia subduction zone and Queen Charlotte Fault system, across the accretionary Cordillera, to the stable North American craton, the region records a long history of subduction, terrane accretion, lithospheric deformation and removal processes, and mantle flow. This session invites contributions that investigate the structure, evolution, and geodynamics of the Canadian Cordillera and adjacent regions using seismology, geodesy, gravity, magnetotellurics, geochronology and other geophysical, geological or geodynamic approaches. Of particular interest are studies that constrain variations in crustal and upper-mantle structure and characterize seismic anisotropy to illuminate lithospheric layering, inherited tectonic fabrics, present-day deformation, and mantle flow. We also welcome studies addressing plate–mantle interaction and deep mantle processes, including slab deformation and fragmentation, slab windows, asthenospheric upwelling, mantle convection, and their influence on the thermal, tectonic, geologic and topographic evolution of western North America. By bringing together observations and models across different depths and spatial scales, this session aims to advance our understanding of how subduction, deformation, and mantle dynamics build and modify continental lithosphere, and how the actively deforming Cordillera transitions into stable cratonic North America.