Difficult Run above Fox Lake near Fairfax

Is this flow normal for July 30?

Today's 0.77 cfs is 82% below the median for this date — which counts as low water here.

The median flow on this date is 4 cfs, across 17 years of USGS record at this gauge. Whether that is runnable depends on the stretch — this is context, not a recommendation.

Why this score

• Wind — 11 mph — noticeable but manageable-11

We don't have launch notes for this one

This page is built from the USGS gauge at this location, so the flow and weather are real — but we haven't verified where to put in, what the hazards are, or whether this stretch is legal or sensible to paddle. We'd rather say that than invent it. The links below are where to find out.

We also don't have a verified safe-flow range here, so the Paddle Score reflects weather only. Judge the flow number against local knowledge, not against our score.

Do your own homework

We show you live conditions. For local knowledge — where to put in, what the hazards are, whether it's worth the drive — here's where paddlers actually talk about this water. We don't vet these sources; check the dates and judge for yourself.

• Paddler discussion on Reddit ↗

  Trip reports and local warnings, straight from the source

• Search American Whitewater ↗

  Rapid classifications and gauge-linked run descriptions

• Satellite view and access roads ↗

  Check parking, put-ins, and what the banks actually look like

• Video from this water ↗

  The fastest way to see the character of a run before you drive

• USGS gauge 01645704 ↗

  Full hydrograph, historical flows, and station metadata

Nearby water

• South F Little Difficult Run above Mouth near Vienna2 mi
• The Glade near Howland Drive at Reston3 mi
• Snakeden Branch above Lake Audubon at Reston3 mi
• Flatlick Branch above Frog Branch at Chantilly5 mi
• Long Branch at Olley Lane near Fairfax5 mi
• Long Branch near Annandale7 mi