RIVER GAUGE · DIFFICULT RUN
Difficult Run near Great Falls
Fairfax County, Virginia
Water level2.49 ft
Flow8 cfs
Last readingSep 16, 2026, 4:15 PM UTC (last recorded)
Action9 ft
Minor flood11 ft
Moderate flood13 ft
Major flood20 ft
The past week
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What floods at each level
- 20 ft
Water approaches structures near the stream.
- 13 ft
Water reaches the intersection of Leigh Mill Road and Kelso Road.
- 11 ft
Leigh Mill Road floods near Difficult Run.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jun 21, 1972 | 21.4 ft | 32,200 cfs |
| Sep 8, 2011 | 17.54 ft | 17,000 cfs |
| Sep 5, 2008 | 16.62 ft | 14,300 cfs |
More on Difficult Run
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