Yellow-Bellied Marmot?

Description:

Yellow-bellied marmots are a small to medium-sized rodents. Males are longer than females and weigh significantly more. They have robust bodies, with short and broad heads. The underfur of yellow-bellied marmots is soft, dense, and wooly on the back and sides of the body. Longer, coarse outer guard hairs with lighter tips and darker bases cover the entire body, making the overall color yellow-brown to tawny.

Habitat:

Yellow-bellied marmots are distributed widely in the western United States and Canada. They range as far north as south-central British Columbia and Alberta in Canada and as far south as the Sierra Nevada. Yellow-bellied marmots generally live in moderately warm, dry habitats at low to mid elevations. They are found in many different habitats, including semi-desert, woodland and forest openings, and the alpine zone. Those that live further south live at higher elevations.

Notes:

Not 100% sure about the ID as I could not verify that Yellow-Bellied Marmot lives on Mt. Rainier. However, this marmot looks a lot different from the other marmot (Hoary Marmot) spotted on the same trail ( http://www.projectnoah.org/spottings/349...). This YB marmot was spotted on a higher elevation (above 6,000 ft) near Paradise Glacier. The fur color is a mixture of dark brown, brown, orange and yellow/cream while the hoary marmot was light to dark gray. We heard their call, which sounded like a long whistle (photo #6). Maybe warning other marmots of our intrusion?