Waterlands
Difficult Run
USGS · 01646000
DIFFICULT RUN
USGS · 01646000LIVE

DIFFICULT RUN NEAR GREAT FALLS, VA

RESTON, VA38.9759°N, -77.2458°W Updated 1 hr ago
FLOW RATE
66.5cfs
GAUGE HT
3.40ft
WATER TEMP
77°F
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
66.5cfs 143.0% vs avg
Optimal band: 48–65 cfs
PERIOD HIGH
695cfs
PERIOD LOW
28.1cfs
RUNNABLE
16%
last 1 day in band

Gauge Height

3.40ft

Water Temperature

77.2°F

Water Turbidity

Precipitation History
Your History · DIFFICULT RUN NEAR GREAT FALLS, VA

Track your history

Sign in to track your sessions at DIFFICULT RUN NEAR GREAT FALLS, VA — best days, monthly trends, and time on the water.

Sign in
SPONSORED

Station Location

38.9759, -77.2458
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-12 11:15 UTC
Site #01646000·USGS

Create a free account to save favorites, set flow alerts, and track conditions

Sign up free