The Upper Snake River in Wyoming and the native “fine-spotted” Snake River cutthroat trout population it supports are keystones in one of the most iconic landscapes in the world, as well as a core economic driver regionally. In recent years, there has been growing attention on the management of water releases from Jackson Lake Dam and its effects on native fish, macroinvertebrates, the ecosystem as a whole, as well as the communities and stakeholders that depend on these resources. At the same time, water and resource managers have identified critical information gaps that need to be addressed in order to develop collaborative solutions and science-based management recommendations. Our proposal seeks to study the relationship between the aquatic ecosystem, floodplain topography, hydrology, and water management in the upper Snake River to provide water and resource managers with the information and tools they need to make informed management decisions that seek to balance aquatic resource protection with other demands such as irrigation and recreation. The project is located in the upper Snake River between Jackson Lake Dam and Wilson, Wyoming.