Analyses of data on first peak yields of 1346 Holstein Friesian (HF) × Sahiwal crossbred cows belonging to four Indian military dairy farms were carried out. There were highly significant differences amongst different grades. The < ⅛ HF had the minimum (9·35 kg) and £ HF had the maximum (12·77 kg) peak yield during first lactation. Half-breds appeared to be most suited for peak production. Genetic grades, farms and periods of calving had highly significant, and season of calving had significant, influences on peak yield in cross-bred cows. Heritability of peak yield was 0·405±+ 0·023. Peak yield had highly significant and positive genetic and phenotypic correlations with total lactation yield, 300-day milk yield, milk yield per day of first calving intervaland milk yield per day of age at second calving. Interval, in days, between the dates of first and second calvings was considered the first calving interval. Age, in days, at the time of second calving was considered age at second calving. The high heritabilities and desirable correlations indicate the possibility of satisfactory correlated response in thesetraits, if selection is based on peak yield.