In recent years, there has been a significant increase in federal funding for identifying, understanding, and more efficiently utilizing renewable energy nationwide. One project funded by the U.S. Department of Energy allows state geological surveys to research, compile, and submit data related to potential geothermal resources to the National Geothermal Data System (NGDS). As part of this effort, the Washington State Department of Natural Resources (DNR) through the Division of Geology and Earth Resources (DGER) (Washington Geological Survey) is acquiring new geochemistry from thermal and mineral springs around Mount Rainier using current geochemistry methods. Geochemistry collected from numerous thermal and mineral springs throughout the park (omitting near- or at-boiling-point fumaroles located around the summit) will provide geologists with an opportunity to understand the characteristics of the heat source, the reservoir temperature at depth, and the influence of meteoric water on a geothermal system. This data alone would paint a very narrow picture of the geothermal potential of Washington State; however, when combined with related data collected statewide, it becomes a very powerful and robust dataset. The objective of this project is to provide a more complete dataset for future research on geothermal systems in Washington State. Sampling around Mount Rainier is not intended for geothermal resource development within the park.