Details. Season Open through Wed Sep 11 2013 Location Getting There: GPS Info. (Latitude, Longitude): 35.23417, -107.70139 35°14'3"N, 107°42'5"W. From Grants, take New Mexico State Highway 547 for 10 miles to the campground. Basic Info Total Sites: 15. The Coal Mine Canyon Nature Trail begins in the campground and leads hikers less …