ERO Resources Corporation (ERO) is conducting revegetation tests on the Beartooth Plateau to assist Federal Highway Administration (FHWA) in identifying techniques that maximize opportunities for successful revegetation along high altitude portions of U.S. Highway 212, the Beartooth Highway. A portion of the Beartooth Highway that travels through alpine and subalpine areas is proposed for reconstruction by FHWA. ERO and FHWA have conducted revegetation experiments since 1999 to identify the most successful revegetation techniques for revegetating alpine areas. This paper presents the findings of the fourth year of annual monitoring of one of the revegetation experiments. In September 1999, ERO placed revegetation tests plots in an existing gravel borrow area along the Beartooth Highway. The variables tested were soil salvaging, seeding rates, soil amendments, and reapplication of Kiwi Power TM or inorganic fertilizer. Native seed was collected on Beartooth Plateau and used for direct seeding of the revegetation test plots. Results from this study will assist mining, oil and gas, and utility companies, highway departments, and other land management agencies in revegetating high altitude disturbances to meet requirements of various state, local, and federal permits. The 2003 monitoring indicated that of all the variables tested, topsoil placement appeared to have the most beneficial effect on vegetation cover. Fertilizer reapplication, seeding rate, and organic material application did not have statistically significant effects on vegetation cover. Additional