Locations: Today, grizzly bear distribution is primarily within but not limited to the areas identified as Recovery Zones including--the Yellowstone area in northwest Wyoming, eastern Idaho, and southwest Montana (9,200 square miles (sq mi)) at more than 580 bears; the Northern Continental Divide Ecosystem of north central Montana (9,600 sq mi) at more than 400 bears; the North Cascades area of north central Washington (9,500 sq mi) at less than 20 bears; the Selkirk Mountains area of northern Idaho, northeast Washington, and southeast British Columbia (2,200 sq mi) at approximately 40 to 50 bears; and the Cabinet Yaak area of northwest Montana and northern Idaho (2,600 sq mi) at approximately 30 to 40 bears. There is an additional Recovery Zone known as the Bitterroot Recovery Zone in the Bitterroot Mountains of east central Idaho and western Montana (5,600 sq mi) but this area does not contain any grizzly bears at this time. The San Juan Mountains of Colorado also were identified as an area of possible grizzly bear occurrence, but no evidence of grizzly bears has been found in the San Juan Mountains since a bear was killed there in 1979.