Arizona has landslides - lots of landslides. But how many? What types? Where are they? The very limited, fragmented and incomplete data regarding the nature and extent of landslide hazards within Arizona makes assessing landslide risks difficult. To address this knowledge and data gap, the Arizona Geological Survey (AZGS) has begun conducting the first comprehensive landslide inventory in Arizona. Task 1: Design and build a GIS database capable of accommodating diverse landslide data from many sources, utilizing a comprehensive metadata structure that is versatile, easily updated as new mapping or data become available, and compatible with the US Geoscience Information Network (USGIN). Task 2: Compile all documented landslides from available maps and reports, map archives, and published journal articles. Task 3: Work with our partner agency, the Arizona Division of Emergency and Military Aairs, (DEMA) and with our stakeholders to identify and prioritize areas requiring new mapping of known but previously undocumented landslides. Task 4: Incorporate the new landslide information into the 2018 State of Arizona Hazard Mitigation Plan, and provide assistance for incorporating the data into local and tribal hazard mitigation plans. Task 5: Get the word out - reach out to public and civil authorities with map tools identifying landslides.