Where is the park? This looks kinda close -- but not really a match. It's a photo of a common woodchuck like we have in the east? -- here's a link to the page and photo

http://animaldiversity.ummz.umich.edu/site/resources/victor_loewen/marmota.jpg/view.html

The other marmot species don't quite match either, unless there's a lot of racial variation.

Is there a mammalian taxonomist in the house??