The snowpack over the Sierra Nevada mountain range is the primary source of water supply for California. Many studies have shown that the increase in aerosols could lead to a reduction of snowpack in this region. This study focus on evaluating the snowpack changes during winter and summer seasons from 2000 to 2016 and the relationship between aerosols and Sierra Nevada glaciers retreat. The change detection analysis during this 17 year time period has shown 76.4% and 91.4% snowpack reduction during winter and summer seasons respectively. The aerosol impacts has been examined with the snowfall over the Sierra Nevada glaciers during 17 years between 2000 to 2016 utilizing Aerosol Optical Depth (AOD), Angstrom exponent, snow depth anomalies, snowfall, radiation fluxes and Albedo. Overall, a negative relationship between AOD and snowfall has been observed during the 17 years period based on the correlation analysis method.