3.56K viewsApril 18, 2022 0 wapiti816 April 18, 2022 0 Comments When was Mount Rainier established? 1 Answer ActiveVotedNewestOldest 0 wapiti816 Posted April 18, 2022 0 Comments Mount Rainier National Park was established by Congress on March 2, 1889. You are viewing 1 out of 1 answers, click here to view all answers. Login