Roger Dale Rosentreter (born 1951) is a botanist, plant ecologist, naturalist, and conservationist.

From March 1978 to January 2013 he was a U.S. Bureau of Land Management (BLM) employee, based in Boise, Idaho.

At Boise State University he taught, from 1985 to 1989, flatwater and whitewater canoeing and, from 2001 to 2012, landscaping with native plants.

[1] He harshly criticized the methods used by the BLM in its rehabilitation efforts for sage grouse habitat following the 2015 Soda Fire, which burned nearly 280,000 acres in Idaho and Oregon southwest of Boise.

[6] An avid kayaker and naturalist, Rosentreter has participated in efforts to remove trash from the Boise River and its beaches.