Colorado Parks and Wildlife found an invasive species in Lake Granby. Multiple rusty crayfish were found at Lake Granby during routine aquatic sampling on August 17th. According to CPW, rusty crayfish have been found west of the continental divide before, but this is the first time they have been found in the Upper Colorado River Basin. Crayfish are not native west of the Continental Divide. Lake Granby feeds into the Colorado River and having the invasive crayfish in there can pose a threat to the river’s ecosystem.