The name Irmulco comes from Ireland Murray Lumber Company. The company started out in 1902 with a small steam powered sawmill in Two Rock Valley, six miles west of Willits. Lonzo Irvine and Henry Muir ran this mill until 1909 when the supply of readily available timber was exhausted. The operation was moved along the Noyo River where it ran until 1923.
Prior to the line from Fort Bragg going all the way “over the hill” to Willits it ended at Irmulco. To travel the last sixteen miles to Willits passengers had to alight and catch a stage.
Better them than me!