(Postponed one day from May 18.) Here's an unusual loop hike that highlights some of DC's most interesting history, both man-made and natural. Starting from the Silver Spring Metro, we'll first follow in the footsteps of Confederate General Jubal Early's March on Washington in July 1864. We'll pass the site of the original Silver Spring (the home of Unionist stalwart Francis Preston Blair that Early used as his headquarters), and then head down Georgia Avenue, just as Early's Confederates did, towards the Union stronghold at Fort Stevens. We'll see the Southern front lines at the old Walter Reed site, Battleground National Cemetery, and the reconstructed Fort Stevens itself, where President Lincoln was nearly killed by a Rebel sharpshooter. Then we'll head due west into Rock Creek Park, enjoying lunch somewhere near the Miller Cabin. Our return route to Silver Spring will be mostly along the Park's Valley Trail. Total length of this moderate circuit hike should not exceed 7 miles, with some hilly or rocky stretches in the Park. Bring beverages, lunch, bug spray, sunscreen and the $2 trip fee. Meet at 9 a.m. inside the Silver Spring Metro by the station attendant's kiosk.