 The Alaska Rail Belt Transmission System provides 75% of the state's population with electricity, but it is expected to face increased demand due to electrification of the transportation and heating sectors. Several organizations are working together to develop an integrated resource plan and reliability standards to address these challenges. This effort involves research into the potential of hydropower and pump storage hydropower, PSH, resources located nearby the rail belt transmission system. GIS mapping techniques were used to identify suitable sites for hydropower and PSH, while cost models and least cost path analysis were applied to narrow down the list of potential sites. The results of this study will help determine which energy sources should be further investigated. This article was authored by Leif Britson and Felicia Sicilio.