This spring the Washington Suburban Sanitary Commission (WSSC) will allow hiking and jogging on designated trails at the Rocky Gorge and Tridelphia reservoirs for the first time. The 733 acre Rock Gorge and the 800 acre Tridelphia Reservoir help define HoCo’s southern border with Montgomery and Prince Georges counties. According to this story by Katherine Shaver in The Washington Post, the recreational season “also will be open 30 days longer, from March 15 to Nov. 30.”
You’ll have to pay for the privilege though. Hikers and joggers will need to purchase a Watershed Use Permit from the WSSC.
“Seasonal permits will increase to $70 from $60, and single-day permits will increase to $6 from $5. A new picnic fee will vary by the group’s size but will be $6 for up to five people. People 65 and over can still use the areas for free. The utility issued about 5,600 recreational permits last year.”
You can purchase permits online here.