Technically speaking, the current highway does not traverse the true Slumgullion Pass, which lies just off the highway on the ridge between Cebolla Creek and the Lake Fork of the Gunnison River, at an elevation of about . As a result of a realignment several decades ago (evident by comparing USGS topographic maps of different vintages), the road now takes a shorter but somewhat higher route as it travels east and south from this spot toward Spring Creek Pass. The road sign at the high point refers to Slumgullion Summit rather than Slumgullion Pass in order to reflect this. This is analogous to the usage of the terms Donner Summit and Cajon Summit in California. However, in all three cases, the more familiar but slightly inaccurate name is routinely used.