Difficult Run

Difficult Run
The Difficult Run/Cross County Trail crossing the stream
Country	United States
Location	Northern Virginia
Basin features
River mouth	Potomac River
Basin size	57.7 sq mi (149 km2)

Difficult Run is a 15.9-mile-long (25.6 km)tributary stream of the Potomac River in Northern Virginia in the United States. The area has had many historical uses dating back to the early 1800s. Today, the area is used recreationally by visitors interested in the watershed's variety of options including hiking, biking, fishing, boating, climbing, and bird watching. The wildlife at Difficult Run is vast as 163 different species can be seen depending on the season. There are 41 different soil types found on the trail and alongside the stream. The stream is part of the greater 57.7- square-mile Drainage basin, or watershed, located in the north-central portion of Fairfax County and drains directly to the Potomac River.

Difficult Run flows through Fairfax County to Great Falls Park, on the Virginia side of the Potomac River. The portion of the run through the park has been characterized as "a miniature Mather Gorge and Great Falls." The stream picks up speed as it narrows into a steep gorge with waterfalls and quickly reaches the same level as the Potomac. At the mouth of Difficult Run, one can see a panoramic view of the Potomac River.

The Difficult Run is a tributary stream of the Potomac River that resides in Northern Virginia. The tributary stream is about 15.9 miles long. The stream is located in Fairfax County and drains right into the Potomac River. It is named not for the nature of the stream's rapids themselves; rather, long-boatmen in the time of the Patowmack Company found the two sharp bends of the Potomac near Difficult Run's mouth treacherous.

Mills:

One of the Mills that is along the trail is Tolston’s Mill. This mill was located on the east side of the trail. The Madeira School currently owns this specific mill now. Leigh Mill was once located on the west side of the trail and was once used to grind and produce corn in flour during the late 1800s. Colvin’s Mill, which is currently a part of Colvin Run Mill Park used to be managed by Fairfax County Park Authority. Brown’s Mill was located on a tributary of the trail. Brown’s Mill was right across from Beulah Road.