Paducah and Louisville Railway (PAL) locomotive 4120, ex UP 4120, pulls the daily local back south toward Princeton, Ky as it pulls through Richland, Ky, on January 31st, 2024. The unit is one of several Union Pacific engines that PAL recently acquired and unit they get their time in the paint shop, sport the PAL logo on the nose and side. With the paint over the UP herald, it looks like the engines have a mustache to me.
Tech Info: Nikon D810, RAW, Sigma 150-600 @ 600mm, f/6.3, 1/500, ISO 90.