Several rescue boats were deployed to the area of the river near Billy Goat Trail A around 4:30 p.m., Montgomery County Fire and Rescue spokesman Pete Piringer said.
Temps hovered around 40 degrees as rescuers pulled the hiker to shore. Injuries were unknown as of 7:40 p.m.
The trail is 4.7 miles long and follows a path between the C&O Canal and Potomac River within the Chesapeake and Ohio Canal National Historical Park. It is located near MoCo's Great Falls.
Click here to follow Daily Voice Gaithersburg and receive free news updates.