Nowhere in Washington does the observer-effort caveat loom larger than with the hoary marmot. Mount Rainier National Park holds 2,338 of the state’s roughly 3,200 records, and Pierce County, home to the mountain, dwarfs every other county. Rainier’s subalpine meadows are genuinely prime marmot country, but they’re also some of the most hiked terrain in the West, and the record counts reflect both truths at once.
Strip away the Rainier effect and a more honest range map emerges. The Alpine Lakes, Glacier Peak, Mount Baker, Goat Rocks, and Pasayten wilderness areas all hold solid clusters of reports, tracing a nearly unbroken line of marmot habitat down the Cascade crest, with Whatcom, Lewis, Chelan, and Skagit counties each contributing a few hundred records. NatureServe ranks the species apparently secure in Washington.
The seasonal rhythm is the sharpest in the data. Reports begin in May, explode in July and August, then taper through September, with the long months from October to April spent hibernating under the snowpack. When you hear that piercing whistle above treeline in midsummer, you’re meeting an animal running its whole year on a four-month clock.
Full species profile
