Heberly Run is a tributary of East Branch Fishing Creek in Sullivan County, Pennsylvania, in the United States. It is approximately long and flows through Davidson Township. The watershed of the stream has an area of . Its tributaries include Quinn Run and Meeker Run. The stream also has a number of waterfalls. It is partly in Pennsylvania State Game Lands Number 13. The forests near the stream largely consist of second-growth woods. Course Heberly Run begins on the top of a mountain in Davidson Township. It flows east for a few tenths of a mile, quickly becoming highly steep. It then turns roughly south and its valley becomes very deep, reaching heights of approximately within . In this stretch, the stream receives Meeker Run, its first tributary. Eventually, Heberly Run turns southeast and then east, its valley becoming deep. At the Lewis Falls, it receives Quinn Run and turns southeast. After approximately a mile, the stream's valley becomes deep. Shortly after this, it enters the valley of East Branch Fishing Creek and reaches its confluence with that creek near the border between Sullivan County and Columbia County. Heberly Run joins East Branch Fishing Creek upstream of its mouth. Tributaries Tributaries of Heberly Run include Quinn Run and Meeker Run. Hydrology At its headwaters, the discharge of Heberly Run is 5,787,000 gallons per day. Downstream of the tributary Meeker Run, the stream's discharge is 12,931,000 gallons per day. At the mouth of Heberly Run, it increases to 24,076,000 gallons per day. The concentration of aluminum at the headwaters of Heberly Run is 0.24 milligrams per liter and the daily load is . The concentration is 0.18 milligrams per liter and the load is downstream of Meeker Run. At Heberly Run's mouth, the concentration is 0.15 milligrams per liter and the daily load is . The acidity concentration at the headwaters of Heberly Run is 4.40 milligrams per liter and the alkalinity concentration is 5.84 milligrams per liter. The daily loads of these substances are and , respectively. Downstream of Meeker Run, the acidity concentration is 2.87 milligrams per liter and the acidity load is per day. The alkalinity concentration is 6.83 milligrams per liter and the daily load is . At the mouth of Heberly Run, the acidity concentration is 2.80 milligrams per liter and the concentration of alkalinity is 6.93 milligrams per liter. The daily loads for these substances