Mount Rainier National Park
Leashed dogs are welcome on roads, in parking lots and campgrounds. Your pet must be under your control at all times and may not be staked. Pets are not allowed on trails, snow, in any buildings or amphitheaters, or in the Wilderness. However, dogs on a leash (not more than 6 feet) are allowed on a small portion of the Pacific Crest Trail near the park's eastern boundary. Visit Website
Or call (360) 569-2211 for more information.