Wikipedia
Forterra
Forterra (formerly Cascade Land Conservancy), based in Seattle, Washington, US, is the state of Washington’s largest land conservation, stewardship and community building organization dedicated solely to the region. The Cascade Land Conservancy is a non-profit, 501(c)(3) organization governed by a Board of Directors.
Currently, Forterra operates in multiple counties. Principal offices are in Seattle, Ellensburg, and Tacoma.