CPW River Otter Shapefile Download

Updated December, 2025 CONCENTRATION AREA: Areas where otters are known to concentrate. Otter sightings and signs of otter activity are higher in these areas than in overall range. OVERALL RANGE: An area which encompasses all mapped seasonal activity areas within the observed range of a population of river otters. WINTER RANGE: Areas used by otters during the period when ice cover is prevalent. Will normally but not necessarily be smaller than overall range. This information was derived from Colorado Parks and Wildlife field personnel. Data was captured by digitizing through a SmartBoard Interactive Whiteboard using topographic maps and NAIP imagery at various scales (Cowardin, M., M. Flenner. March 2003. Maximizing Mapping Resources. GeoWorld 16(3):32-35). These data are updated on a four year rotation with one of the four Colorado Parks and Wildlife Regions updated each year. These data are not updated on a statewide level annually.