The primary objective of the Mission Bay-Tecolote Creek Historical Ecology Study was to gather and document information about historical landscape patterns and ecological conditions in the region prior to major Euro-American modification to inform restoration planning. The reconnaissance-level study leverages and builds on prior historical ecology work by the San Francisco Estuary Institute (SFEI) and partners in Mission Bay, including wetland mapping based on U.S. Coast Survey T-sheets and a reconnaissance study focused on the northern portion of Mission Bay around Rose Canyon. This study focused on collection and compilation of selected high-priority data sources and documentation of emerging findings, and does not include comprehensive data collection or digital mapping of historical landscape patterns. Research focused primarily on historical landscape patterns—i.e., habitat distribution and channel configuration—though limited information was also collected on topics such as vegetation community composition and structure, streamflow patterns, wildlife support, Indigenous management practices, and landscape change over time.