Is Metal Detecting allowed in VA: YES, with permission of park manager.
The only reference found on metal detecting was in the Fairfax Country Park Policy manual found HERE: Other counties may have similar polices. Ensure you check with Park Management before hunting.
§1.13 Metal Detectors
No person shall use a metal detector or similar device within a park without the express written permission of the Park Authority.
FMDAC Disclaimer: FMDAC assumes no responsibility for any person who knowingly or accidentally violates any state park regulation. Although FMDAC will try to keep this information current we cannot anticipate how each regulation will be interpreted by a specific park department, park employee or other government employee. It is the sole responsibility of each individual to know and obey the regulations of the park or area they are visiting and or metal detecting.