Mounds of the Tualatin-Yamhill Kalapuyan Area

Documents have been uncovered that address the Kalapuya mounds in the Tualatin and Yamhill valleys. The most famous Kalapuya mounds are those that were along the Calapooia river and tributaries from Corvallis to Sweet Home. In this area over 100 mounds existed. Most of these mounds have been plowed under, so that there may be … More Mounds of the Tualatin-Yamhill Kalapuyan Area