In 1991,
Douglas Tompkins bought a large, semi-abandoned plot of land in the
Reñihue River Valley of the Chilean province of Palena. A mountaineer and conservationist who had been visiting Patagonia since the early 1960s, Tompkins sought to protect the tract, most of which was primeval
Valdivian temperate rainforest, from future exploitation. After moving to Reñihué to live full-time with his wife,
Kris Tompkins, Doug began developing plans for a larger park, gradually acquiring additional adjacent properties from willing sellers. Ultimately, roughly 98 percent of the park's land area was bought from absentee landowners. Tompkins Conservation (then called The Conservation Land Trust) subsequently added approximately in nearly contiguous parcels to form Pumalín Park, which was declared a Nature Sanctuary on August 19, 2005, by then-president
Ricardo Lagos. This special designation by the Chilean government granted the land additional protections to secure its ecological values and prevent development. While nature-related philanthropy has a long tradition in the United States, large-scale private land acquisition for parks was unfamiliar in Chile, and initially generated skepticism and political opposition. The land holdings which eventually turned into Pumalín Park, stretched from the border of Argentina to the Pacific Ocean, effectively cutting the country in half. This was once described as a security threat by a Chilean official. Some locals said that the Tompkinses were going to remove cattle from the land and introduce American bison. Others said that the land was going to be used as a nuclear waste dump. Over the years of the project's development, confidence has been built, both locally and nationally, as Pumalín Park's public access infrastructure began serving thousands of visitors annually. Pumalín Park was designated a national park in 2018, prompted by Tompkins Conservation's donation of almost for the new park, named Pumalín Douglas Tompkins National Park in honor of its founder. == Biodiversity ==