| Item | Date added |
|---|
| Bacon Ridge Natural Area | on Feb 17, 2019 |
| Bent Creek | on May 6, 2013 |
| Black Hill Regional Park | on Aug 5, 2013 |
| C&O Canal | on Jan 27, 2013 |
| Cabin John Trail | on Oct 14, 2012 |
| Carvin's Cove Trail system | on Dec 27, 2019 |
| Deer Lake Lodge / 664 | on May 7, 2013 |
| Deerfield Loop / 335 | on May 7, 2013 |
| Fairland Recreational Park | on Mar 4, 2007 |
| Fountainhead Regional Park | on Aug 16, 2012 |
| Freedom Center | on Jan 25, 2014 |
| Green's Lick | on May 6, 2013 |
| Homestead / 333 | on May 7, 2013 |
| Hoyles Mill Connector | on Jul 23, 2013 |
| Lake Accotink Network | on Apr 28, 2013 |
| Lake Needwood Trails | on Oct 7, 2012 |
| Laurel Hill Park | on Jan 20, 2013 |
| Little Bennett Regional Park | on Jul 5, 2018 |
| Little Hickory Top / 136 | on May 7, 2013 |
| Lookout Mountain/ Wild Oak | on Mar 5, 2019 |
| Lower Magruder Trail | on Oct 7, 2012 |
| Lower Sidehill / 137a | on May 6, 2013 |
| McKeldin Area | on Apr 20, 2014 |
| Meadowood | on May 27, 2013 |
| Muddy Branch Greenway Trail | on Oct 1, 2012 |
| North Boundary Road / 135 | on May 6, 2013 |
| Northwest Branch Trail | on Mar 26, 2018 |
| Patapsco Valley State Park (Avalon Area) | on Jul 19, 2013 |
| Patapsco Valley State Park (mckeldin Area) | on Jul 7, 2014 |
| Pinetree Loop / 336 | on May 7, 2013 |
| Quantico Trail | on Aug 17, 2014 |
| River Road Dirt Section | on Nov 20, 2014 |
| Rockburn Branch Park | on Jul 19, 2013 |
| Ronald C. McDonnell Campground Loop | on Oct 14, 2012 |
| Rosaryville State Park | on Jan 13, 2013 |
| Schaeffer Farms | on Aug 16, 2012 |
| Seneca Bluffs Trail | on Oct 22, 2012 |
| Seneca Creek | on Dec 7, 2012 |
| Seneca Creek Greenway Trail | on Sep 10, 2012 |
| Seneca Creek State Park Trail | on Dec 7, 2012 |
| Seneca Ridge Trail | on Sep 4, 2012 |
| South Germantown Pump Track | on Aug 5, 2013 |
| Vineyard Trail | on Oct 3, 2019 |
| Wakefield | on Apr 28, 2013 |
| Woodstock | on Mar 18, 2019 |
