Hoary Marmots, Mount Rainier National Park, WashingtonI can’t be certain if this was a fight or foreplay, but these two marmots were really going at each other. Photographed up on Mount Rainier in Washington state. Nikon D300 with Nikkor 200-400mm lens (at 400mm) ISO 200, f/5.6 at 1/250th of a second.