Martha Custis Trail is a 12.9 mile moderately trafficked out and back trail located near Arlington, VA that features a great forest setting and is rated as moderate. The trail offers a number of activity options and is accessible from March until October.
Custis Trail is a point-to-point trail located near Arlington, Virginia and is rated as difficult. Custis runs parallel to I-66 through Arlington, and it connects the W&OD trail with downtown Washington DC. The trail offers a number of activity options and is accessible year-round.
My fave running trail by far. Undulating hills (sometimes steep) with nice vegetation around. Will take you from Falls Church/Arlington to the edge of DC and back. It coasts along the busy 66. You can also pick up the best Italian sub and NY style pizza at the Italian Store, between mile 2.5 and 3. Also, there is something satisfying about beating the stalled traffic in the morning commute by bike to Georgetown U. Water stops at mile 0 and 2.
This trail goes about 5 miles from the Potomac River in Rosslyn (where it hooks up with the Mt Vernon Trail) to the WOD Trail. It's not a rail to trail trail, which means it is hilly - rails to trails are less hilly because the trains that formerly used the routes couldn't handle steeper grades. It's shady, not too crowded, and will get you to any number of places in Arlington, especially along the Orange Line Metro. Highly recommended.