E-Fauna BC: Electronic Atlas of the Wildlife of British Columbia

Williams et al. (2014) indicate this species is found from "Mountain West from CA in the southern Nevada to BC, in the Rocky Mountains to CO and NM, and in the Tundra/Taiga region of AK and western Canada, with disjunct populations in the upper US Midwest, Northern ON, and Maritime NB. Moderately common throughout its range."

Reference: Williams, Paul, Robbin Thorp, Leif Richardson and Sheila Colla. 2014. Bumble Bees of North American: An Identification Guide. Princeton University Press.