The objective of the study was to determine the enteric methane emissions from lactating and dry cows fed on rotational grazing on ryegrass/clover with supplementation of oat and vetch forage in the Andes of Peru. Sulfur hexafluoride (SF6) tracer gas methodology was used to determine enteric methane emission; the external marker Titanium dioxide (TiO2) to determine the production of feces and the protein in feces was used to estimate the digestibility of the feed. The enteric methane emissions of 5 lactating cows (LC) and 6 dry cows (DC) Brown Swiss breed were 358.5 and 337.4 g CH4/cow/day for LC and DC, respectively (P> 0.05). The conversion factor from gross energy to methane (Ym;%) was 9.7 for LC and 9.6 for DC. The enteric methane yield per kilogram of organic matter consumption was 32.5 g CH4/lactating cow /day and 32.2 g CH4/dry cow/day (p> 0.05) and the emission per kilogram of metabolic live weight for lactating cows was 3.1 g CH4/kg PV0.75 and for dry cows 2.9 g CH4/kg PV0.75 (P> 0.05). It was concluded that enteric methane emissions are similar for lactating cows and dry cows measured with the SF6 tracer gas technique.