Data file associated with: Huijser, M.P. & M.A. Bell. 2024. Identification and prioritization of road sections with a relatively high concentration of large wild mammal-vehicle collisions in Gallatin County, Montana, USA. Report number 4WA834. Western Transportation Institute, Montana State University, Bozeman, Montana, USA. The file contains carcass removal records collected by the Montana Department of Transportation (MDT) for each species (larger than a coyote) and totals (regardless of species) by each tenth of a mile along the numbered Interstates, US Highways, and State Highways in Gallatin County, Montana, USA. In addition, the file contains wildlife-vehicle crash data (no species specified) collected by law enforcement personnel by each tenth of a mile along the numbered Interstates, US Highways, and State Highways in Gallatin County, Montana, USA. Both the carcass removal and crash data relate to the period 1 January 2008 through 31 December 2022 (15 full calendar years).