Gifford Pinchot National Forest includes over 1.3 million acres of forest, wildlife habitat, watersheds & mountains, including Mt. Adams & Mount St. Helens National Volcanic Monument.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/places/us-national-forests/gifford-pinchot-national-forest/official-website/fs.usda.gov.md