Sample sites used in black particles from road tire wear study

Map showing locations of snow sampling sites (black circles) within the Upper Colorado River basin, the Colorado River, and the Continental Divide. The locations are Berthoud Pass, Grand Mesa, Grizzly Peak, Hoosier Pass, Independence Pass, Kebler Pass, Loveland Pass, McClure Pass, Park Cone, Rabbit Ears Pass, Swamp Angle Study Plot, Spring Creek Pass, Willow Creek Pass, Wolf Creek Pass. Shaded relief created from the National Elevation Dataset.