Flathead Lake is one of the 300 largest natural lakes in the world and is the largest natural freshwater lake in the western United States. Of those large lakes, Flathead is one of the cleanest. Many species can be found in and around the Flathead Lake and its shores, including waterfowl, shorebirds, raptors, invertebrates, fish, and native vegetation. For more information please visit the following websites:

http://www.umt.edu/biology/flbs/facts/default.html
Flathead Lake Biological Station was established in Bigfork in 1899 by Dr. Morton J. Elrod. The Biological Station was moved to its present location in 1912 and is currently operated as a year-round academic and research facility mainly dealing with aquatic studies.

http://www.flatheadlakers.org/

Flathead Lakers, working for clean water, healthy ecosystems and lasting quality of life in the Flathead Watershed in Northwest Montana.

http://www.digisys.net/fbc/
The Flathead Basin Commission was established by the Montana Legislature to monitor water quality in the Flathead Basin and to recommend action when needed.