Just as the sun is setting, BNSF 6751 East roars out of a rock cut a little west of Mesita, NM.

BNSF 6751 (ES44C4) leads a work train that is placing concrete ties along the stretch of track that runs past the Valmont Power Plant in Boulder, Colorado.

An eastbound manifest makes good time descending Winston Hill as it approaches Townsend, MT on Montana Rail Link. The third unit is a rebuilt SD60M courtesy of Norfolk Southern.