The distinctive silhouette of Douglas fir (Psuedotsuga menziesii), said not to occur naturally in the Tahoe Basin. I have otherwise only seen them here in old neighborhoods, where folks presumably planted them. There are a few growing right here in the forest though, a quarter mile above the former site of a Girl Scout camp from the middle of the last century, and a few hundred yards above the through trail, a couple miles up canyon from the Lake.