Mount Rainier Dog Policy
Mount Rainier National Park is Not Dog Friendly
Mount Rainier, an active stratovolcano, is the most prominent peak in the Cascades and is covered by 26 named glaciers including Carbon Glacier and Emmons Glacier, the longest and largest in the contiguous United States respectively. The mountain is popular for climbing, and more than half of the park is covered by subalpine and alpine forests and meadows seasonally in bloom with wildflowers. Paradise on the south slope is among the snowiest places on Earth. The Longmire visitor center is the start of the Wonderland Trail, which encircles the mountain.
Mount Rainier National Park is not a very dog friendly park. While dogs can use one trail, and are allowed on campgrounds and along roads, they are not allowed on most trails, and the road policy is more restrictive than many other national parks.
Dogs are not allowed on almost every trail at Mount Rainier National Park. The only exception is that they're allowed on the Pacific Crest Trail that's on the eastern border of the park, as long as they're a leash no longer than 6'.
Dogs are allowed at any campgrounds open to vehicles, as long as they're on a leash no longer than 6'. Dogs can't be left unattended. Campground details are below:
Location & Map
Ashford, Enumclaw, Packwood, Wilkeson
 Overview text from the Wikipedia article List of national parks of the United States, which is released under the Creative Commons Attribution-Share-Alike License 3.0.All other text and images, except where noted, copyright ASR Concepts, LLC, all rights reserved.