Estivant Pines Nature Sanctuary is a 508-acre protected forest in Keweenaw County, Michigan. Once part of Edward Estivant's 2,400-acre tract, threatened by logging, a 1973 campaign secured 200 acres for conservation. Expansions from 1989 to 2005 enlarged the sanctuary to 510 acres, protecting one of Michigan's last old-growth white pine stands, aged over 300 years, with some trees over 125 feet tall. Estivant Pines also boasts biodiversity, with 85 bird species, including woodpeckers and red crossbills. Despite a thin soil and boreal climate, the sanctuary showcases wildflowers like asters and violets, alongside ferns such as maidenhair and holly fern.