Thalictrum heliophilum is a species of flowering plant in the buttercup family known by the common names Cathedral Bluff meadow-rue and sun-loving meadow-rue. It is endemic to Colorado in the United States, where it is known from three counties. There are 18 occurrences of this plant for an estimated total of less than 200,000 individuals. Threats to the species include oil and gas development, as there is active petroleum exploration in the Piceance Basin. Other threats include introduced species of plants and grazing and trampling by wild animals.