Bluff Lake Nature Center is a nonprofit agency that owns and manages a unique urban wildlife refuge and outdoor classroom in Denver. The refuge is home to an abundance of animals and native plants which thrive in a variety of habitats. On May 19th, RK employees (and a few of their kids) volunteered to help remove invasive species plants in both the upper and lower areas of the preserve. Visit the website at http://www.blufflake.org/