Berthoud, town (1990 pop. 2,990), Larimer co., N Colo., 7 mi/11.3 km S of Loveland, on Little Thompson R.; 40°18'N 105°04'W. Elev. c.5,030 ft/1,533 m. Sugar beets, potatoes, grain; cattle, livestock. Mfg. (plastic forming; mobile homes). Oil field nearby. Agr. research. Carter L. to W.