During the recent construction of a new highway linking Glacier and Yellowstone National Parks a number of deep cuttings have had to be made in the Little Belt Mountains. Some nine miles south-south-east of the once prosperous mining town of Neihart the road crosses the divide at King's Hill (7,400 feet O.D.) and, passing from Cascade County into Meagher County, starts a long and gradual descent into Sheep Creek. Along the side of the creek for a distance of several miles a series of sections reveal that the country rock is here cut by igneous intrusions with interesting contact-metamorphic effects. The mineralogy of the contact rocks has already been described by the author (l): the present communication describes the field relations and considers some problems of paragenesis.