The Great Allegheny Passage is a motor-free recreational rail trail that connects Pittsburgh, Pennsylvania with Cumberland, Maryland. From there it links up with the Chesapeake and Ohio (C and O) Canal towpath, and ends in Washington, D.C. The Allegheny Trail Alliance is a group of seven trail organizations which joined together to bring the trail, the longest Rail Trail in the East, to completion.
Regardless of whether you are headed east towards Washington, or west towards Pittsburgh, you will find it is indeed (generally)*all downhill from here* at the cache and about 2735 feet above sea level. From the Eastern Continental Divide, water flows in one direction towards the Chesapeake Bay and the Atlantic Ocean. In the other direction, water flows towards the Ohio River, the Mississippi, to New Orleans and the Gulf of Mexico.
The actual continental divide location on the trail is deceptive. It lies halfway between this geocache, and Deal, about 1.5 miles to the northwest. It also is about 300 feet lower in elevation, than here on the top of Big Savage Mountain and Big Savage Tunnel. It is marked by a road overpass and a much less conspicuous tunnel through which the Great Allegheny Passage travels. That underpass now has a prominent sign overhead depicting the “Eastern Continental Divide”. The valleys on either side of THIS ridge would both take you to the Potomac River and downstream towards Washington DC.
NOTE: This cache dates from the earlier years of geocaching when it was much more than just a "bike and grab numbers game"!.