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Difficult Run at Browns Mill Road / Wolf Trap

Highest listed crest 196.37 ftFlood stage 195.0 ft10 crests since 2019

The Difficult Run at Browns Mill Road / Wolf Trap crested above flood stage 10 times among the 10 crests the National Weather Service lists from 2019 to 2025. The highest, 196.37 ft on July 13, 2025, was minor flooding, 1.37 feet above flood stage.

The gauge

Highest listed crest
196.37 ft
July 13, 2025
Flood stage
195.0 ft
No major stage set
Crests at major
0
10 above flood stage
Most recent flood crest
July 13, 2025
196.37 ft, minor flooding
Location
Fairfax County
Near Vienna (4.1 mi), Herndon (5.3 mi), Fairfax (6.9 mi)
Identifiers
NWS DRBV2
No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Difficult Run at Browns Mill Road / Wolf Trap
Action stage194.30—The level at which the NWS or its partners begin to take action
Flood stage (minor)195.010Jul 13, 2025Minimal or no property damage, but possibly some public threat

Every listed crest

10 crests from 2019 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Difficult Run at Browns Mill Road / Wolf Trap, 2019 to 2025 195195.5196196.5ft Flood stage 195.0 ft Nov 1, 2019: 195.45 ft, minor floodingJan 25, 2020: 195.60 ft, minor floodingApr 13, 2020: 195.85 ft, minor floodingOct 26, 2021: 195.89 ft, minor floodingMay 7, 2022: 196.09 ft, minor floodingMay 23, 2022: 195.05 ft, minor floodingJul 9, 2022: 196.03 ft, minor floodingAug 11, 2022: 196.24 ft, minor floodingMay 14, 2025: 195.01 ft, minor floodingJul 13, 2025: 196.37 ft, minor flooding Highest, 196.37 ft, Jul 13, 2025 20202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Difficult Run at Browns Mill Road / Wolf Trap 2010s: 1 2020s: 9 9 2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Difficult Run at Browns Mill Road / Wolf Trap
1Jul 13, 2025196.37+1.37Minor—
2Aug 11, 2022196.24+1.24Minor—
3May 7, 2022196.09+1.09Minor—
4Jul 9, 2022196.03+1.03Minor—
5Oct 26, 2021195.89+0.89Minor—
6Apr 13, 2020195.85+0.85Minor—
7Jan 25, 2020195.60+0.60Minor—
8Nov 1, 2019195.45+0.45Minor—
9May 23, 2022195.05+0.05Minor—
10May 14, 2025195.01+0.01Minor—

Gauges on the Difficult Run

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Difficult Run
Browns Mill Road / Wolf Trap this gaugeVA195.0196.37 ft, Jul 13, 20250
Great FallsVA11.021.40 ft, Jun 22, 19721

Other gauges in Fairfax County

Flood gauges in Fairfax County
Woodburn Road / Strathmeade Springs251.5258.68 ft, Jul 13, 20250
Annandale9.516.32 ft, Sep 8, 20113
Manassas Park12.020.20 ft, Jul 22, 20180
Huntington - Metro Bridge11.012.92 ft, Sep 9, 20110
McLean9.010.54 ft, Dec 25, 20220
Great Falls11.021.40 ft, Jun 22, 19721
Chantilly9.09.21 ft, Sep 8, 20110
Fairview Lake318.0318.47 ft, Sep 8, 20110
New Alexandria Storm Water Pumping Station - Downstream5.57.51 ft, Jul 8, 20191
New Alexandria Tide Gate5.56.19 ft, Oct 29, 20210

Fairfax County: every hazard · River floods across the country · Virginia

NOAA National Water Prediction Service, gauge DRBV2, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.