Lyndhurst Foundation Investing in the people places and natural treasures of Chattanooga and the surrounding region. Our Programs Geographic Reach The Lyndhurst Foundations geographic focal area encompasses a tristate sixteencounty region including and surrounding Chattanooga and portions of the Lower Tennessee River and Upper Coosa River watersheds. This region has been a major crossroads for the migration of wildlife and humans for thousands of years and is characterized by its unique landforms biodiversity culture and economy. This geography also mirrors that of Thrive Regional Partnership Thrive and reflects a mutual interest in the pursuit of responsible regional growth natural resource conservation community resiliency and collaborative approaches to problem solving.