This annual report presents 2010 results from the monitoring of fish assemblages in the North Coast and Cascades Network (NCCN) as part of the Inventory and Monitoring Program. The Protocol for Monitoring Fish Assemblages in Pacific Northwest Parks was designed for rivers in the NCCN that have high water visibility and are conducive to snorkel methods from June through September each year (Brenkman and Connolly 2008). Although the protocol was specifically designed for use in Pacific Northwest National Parks, it should be helpful in the development of protocols in other National Park Service units and other areas of the Pacific Northwest. The sampling of NCCN rivers is challenging because of high costs, difficult logistics, and safety concerns. The sampling design in this protocol was designed to accommodate many of the challenges inherent in working in remote, roadless wilderness rivers.