Fox Lake is a census-designated place (CDP) in Richland County, Montana, United States.

Lambert was built as a station stop along the Great Northern Railway branch line extending west from Sidney, Montana.

The Lambert post office was established in 1914 with Edmund Bronson as the local postmaster.

About 11.4% of families and 16.2% of the population were below the poverty line, including 27.7% of those under the age of eighteen and none of those 65 or over.

[8] The mascot for Lambert Public School athletic teams is the Fusion.