NORTHERN HARRIERS (CIRCUS CYANEUS) USUALLY NEST NEAR WATER OR WETLANDS IN OPEN, TREELESS HABITATS WITH DENSE VEGETATION. HERE WE DESCRIBE TWO NORTHERN HARRIER NESTS ~800 M APART IN ANOTHER SITUATION, SAGEBRUSH STEPPE ON A MOUNTAIN SLOPE IN CENTRAL WYOMING. ON 28 MAY 2002, WE OBSERVED A MALE AND A FEMALE HARRIER ON THE SOUTH SLOPE OF CROOKS MOUNTAIN, ~16 KM SOUTH-SOUTHWEST OF JEFFREY CITY, FREMONT COUNTY, WYOMING. ON A SUBSEQUENT VISIT, ON 20 JULY 2002, WE LOCATED THEIR NEST (NEST 1, 42.3676° N, 107.9186° W, ELEVATION 2374 M) AFTER A BRIEF SEARCH OF THE AREA WHERE A FEMALE HARRIER FLUSHED FROM THE SAGE AS WE DROVE A LIGHTLY TRAVELED GRAVEL ROAD. ON 8 AUGUST 2002 WE LOCATED THE SECOND HARRIER NEST (NEST 2, 42.3632° N, 107.9110° W, ELEVATION 2299 M) IN A SIMILAR MANNER. BOTH NESTS WERE WITHIN 10 M OF THE CENTERLINE OF THE ROAD. THE FEMALES VOCALIZED AND CIRCLED WITHIN 100 M OF EACH NEST WHILE WE INVESTIGATED. THESE WERE THE ONLY HARRIERS WE HAVE OBSERVED DURING THE BREEDING SEASON IN SAGEBRUSH STEPPE DURING 5 YEARS OF FIELD RESEARCH IN CENTRAL WYOMING. EACH NEST WAS CONSTRUCTED ON THE GROUND OF DEAD SAGEBRUSH LIMBS, LINED WITH GRASS, AND PARTIALLY COVERED BY BIG SAGEBRUSH (ARTEMISIA TRIDENTATA) BUSHES APPROXIMATELY 80 CM TALL.