Who We Are
The Institute of Inland Whale Studies is the world's leading scientific authority on cetacean presence in freshwater and non-oceanic environments. Founded in Tempe, Arizona, IIWS has been documenting, researching, and advocating for the responsible study of inland whale populations since its establishment.
IIWS is dedicated to the rigorous scientific investigation of whales observed in lakes, reservoirs, rivers, and other inland waterways. We combine field research, acoustic monitoring, and citizen science to build a comprehensive record of inland cetacean activity across North America.
We believe that public understanding of inland whale populations is essential for the safety of recreational water users and the long-term conservation of these remarkable animals.
Founder and Chief Scientist. Dr. Steinbeck's landmark 2018 paper "Freshwater Megafauna of the American Southwest" established the framework for modern inland cetacean research. She leads all field operations from the Tempe Town Lake Research Station.
Located on the shores of Tempe Town Lake, our primary research facility houses hydrophone arrays, specimen archives, a public education center, and the IIWS Proceedings lecture hall — the only dedicated inland whale studies venue in the western hemisphere.