3.82K viewsApril 18, 2022 0 wapiti816 April 18, 2022 0 Comments How big is Mt. Rainier? 1 Answer ActiveVotedNewestOldest 0 wapiti816 Posted April 18, 2022 0 Comments Mt. Rainier has an elevation of 14,111′. It also covers an expanse of nearly 370 square miles. You are viewing 1 out of 1 answers, click here to view all answers. Login