After dinner with relatives I met up with at Yellowstone, I headed back into the park to see if I could make it to an area where there had been an elk carcass along the river, with wolves periodically dining on it throughout the day. It didn't take long to realize I wasn't going to make it that far, so I pulled into a small turnout along the Madison River. In short order I set up my camera and tripod, cleaned off the lens, mounted the split neutral density filter and pressed the cable release. This was the result. Nothing else I took that night came anywhere close to this.