Concentrations of 13 trace elements and total suspended particulates were measured for 24 consecutive days in July 1975 at Whiteface Mountain, a remote site in the Adirondack Mountains of New York. High episodic concentrations were observed during a five-day period, July 16 through 20. Air trajectory calculations showed that stagnant air masses originating southwest of Whiteface Mountain were the primary sources of these high concentrations. During July 1976 the sampling network was extended to four stations separated by hundreds of kilometers in New York State plus a site in New Jersey. Air trajectory calculations for July 19 and 20, when peak concentrations of particulates and trace metals were observed at all five stations, strongly suggest that the particulates and trace metals were transported from sources southwest of New York State.