The primary purpose of this report is to describe the background information, methods and results of a surficial geology inventory within the North Cascades National Park Service Complex (NOCA). This is one of twelve basic inventories called for in the National Park Service (NPS) National Resource Challenge. A secondary goal is to provide an overview of bedrock geology, climate, hydrology and vegetation as they affect landform processes. The study area for this report is the Upper Skagit Watershed, which is defined as drainages within NOCA that flow into Ross Lake. On the west side of Ross Lake this includes Little Beaver, Big Beaver, Silver, Arctic, Skymo and No Name Creeks. On the east side of Ross Lake this includes Lightning, Hozomeen, Dry, May, Roland, Devils, Ruby and Panther Creeks.