Promontory Divide, elevation , is a ridge and mountain pass along the border between Custer and Huerfano counties in southern Colorado, USA. Colorado State Highway 69 traverses the pass, which is in the southern part of the Wet Mountain Valley. Watersheds Antelope Creek drains the area to the north of the pass and Muddy Gulch, a tributary of the Huerfano River, drains the area to the south. Water from both sides of the pass eventually drains to the Arkansas River. References Mountain passes of Colorado Landforms of Custer County, Colorado Landforms of Huerfano County, Colorado Transportation in Custer County, Colorado Transportation in Huerfano County, Colorado Ridges of Colorado