Easy, Easy commute round trip. I get on the trail at Clarks Crossing (House backs to trail) and head to Crystal City. 0 dark 30 in the am is the best-very few slow-downs on the trail. Custis trail is a bit up and down and around and around-other words slowest portion of the commute. I normally continue past the Custis turn-off to four mile run, down Glebe under 395 to the end of AN Drive into Crystal City. The whole thing is no big effort, just eat lunch to fuel you home.