Understanding and quantifying earthquake site effects is a critical component of seismic hazard assessment. Ground conditions at local scales can strongly influence seismic shaking through processes such as amplification, resonance, liquefaction, and basin effects. These effects not only modulate the intensity and duration of shaking experienced at the surface, but also contribute to cascading hazards such as landslide triggering and ground failure, with significant implications for infrastructure and community resilience. This session welcomes contributions from researchers and practitioners developing methods for site characterization, hazard quantification, and scenario-based modeling, as well as those conducting detailed studies of specific geographic regions or specific earthquakes. Topics may include, but are not limited to, numerical and experimental studies of site response, physics-based ground motion simulations, probabilistic hazard modeling, and the integration of regional and site-specific approaches to hazard estimation. We also encourage submissions that advance innovative techniques, datasets, and monitoring strategies to better capture the complexity of site and basin effects. By bringing together diverse perspectives on earthquake site effects and hazards, this session aims to foster a stronger scientific basis for hazard assessment and risk reduction. In the Canadian context, advancing this understanding is essential for improving resilience to natural hazards that threaten communities, infrastructure, and critical lifelines across the country, particularly in seismically active regions.