Re: Trails in the DC area?
Will, In DC and into MD there are lots of trails in Rock Creek Park. DC also has some other random trails, particularly in the Georgetown area up towards American University and over to Rock Creek Park i nthe vicinity of Cleveland Park.
In VA, not sure if you are running the Potomac Heritage trail from the Key Bridge area, but, if so, you can also run it out of Great Falls National Park. GFNP also has its own trails as well as access to the Cross County Trail heading west. I also like running little loops in Potomac Overlook Park from time to time. If you live in the Alexandria area or are willing to go slightly further, check out Prince William Forest.
In Maryland, there's the Seneca Greenway Trail.
Check out the Virginia Happy Trails Running Club for more trail info. The club covers a huge area including DC and MD.
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