LONG LAKE PHOTO GALLERY. In a remote area in Southeast Oregon, south of the Hart Mountain National Antelope Wildlife Refuge, are several outstanding rock art sites. Mostly these are ridges surrounding dry lakes. Images here are from Long Lake, which is a 3 mile long narrow dry lake. Thousands of Great Basin images. Click on the first thumbnail to see larger image. Use controls at bottom of each large image to start slide show or go through manually with arrow keys.