Lets go hike Great Falls on the Maryland side. This is about 35 Minutes from Fairfax without traffic. The hike we will be doing should take a couple hours and we can shorten or extend it as we wish. I recommend bringing a couple bottles of water. Plan to meet at the Great Falls Tavern Visitor Center at 11:30am. Please do not be late. We will leave from the visitor center walking south on the tow path to the Billy Goat (1/2mile flat) Go on the Billy Goat to the end (1.75 mile moderate mile marker 13) Continue south on the tow path to anglers (.75 mile) Take Berma Road trail/ tow path back (2 miles) This is a total of 5 miles roughly. Here is a link to their map. http://www.nps.gov/choh/planyourvisit/upload/GF-Map-Page-2.pdf
Afterwards we can grab lunch on the way back at Chilis near Tyson's 8051 Leesburg Pike Vienna, VA 22182
If you need a ride from Woodbridge let me know I can take 3.