Margaret Elizabeth Thomas "Mardy" Murie (August 18, 1902 – October 19, 2003) was a naturalist, writer, adventurer, and conservationist.

Born Margaret Elizabeth Thomas on August 18, 1902 in Seattle, Washington, Murie moved to Fairbanks, Alaska, with her family when she was nine years old.

[6][citation needed] From 1927 onward, the Muries were residents of Jackson, Wyoming, where Olaus studied ecology, specifically the elk population.

Mardy worked side-by-side with Olaus in the field, studying elk, sheep and numerous other animals in the Greater Yellowstone Ecosystem.

Olaus and Mardy took on work as director and secretary of the Wilderness Society, helping draft recommendations for legislation and policy like the protection of Jackson Hole National Monument.

[citation needed] Two in the Far North, a memoir published in 1962, chronicles Murie's early life, her marriage, and research expeditions in Alaska.

Mardy and Olaus spent their honeymoon studying birds and traveling over 500 miles by dogsled, conducting research on the caribou of the Brooks Range.