[4] The University of Montana first received land on Mount Sentinel in 1902 when the Northern Pacific Railroad Company donated 40 acres at the foot and up the slope of the mountain.

[6] Between 15,000 and 13,000 years ago, a Pleistocene Ice Age glacier moved through the Purcell Trench in northern Idaho, damming the Clark Fork River.

[8] Each year, during Native American Awareness Week, a sunrise ceremony is held at the base of the "M" where traditional Salish Morning and Honor Songs are sung.

[10] The University of Montana natural areas weed manager organizes an annual herbicide application on Mount Sentinel.

Over 7,000 work parties worldwide did projects to decrease carbon and heighten the awareness within political circles in order to slow climate change.

[18] Mount Sentinel has a long history of fires, dating back to at least 1930 when the Montana Kaimin reported a grass blaze.

[19] More recently, over 300 acres on Mount Sentinel's west slope, directly above the University of Montana campus, burned in July 2008.

[21] On August 20, 2020, a 25 acre grass fire was started on the West face by two children playing with a lighter[22][23] While largely barren, the flora of Mount Sentinel includes bitterroot plant, balsam root, paintbrush, prairie smoke, penstemons, Ponderosa pine and Douglas fir as well as invasive weeds like knapweed, cheatgrass, leafy spurge and Dalmatian toadflax.