Updated December 2002
Baltimore to Washington on the B&OThis line continues the line out of Baltimore, and separating from the Old Main Line at Relay and turning into the Metropolitan Sub at the wyes in the Washington Union Station approaches. You can ride both ways on the MARC trains over this trackage, which they list as the "Camden Line", but trains are concentrated during the rush hours. Some of what I will describe is not easily accessible without a car.
Roughly paralleling this is the Northeast Corridor, which loops quite a ways to the east. I'm not going to describe it here in much detail because I haven't explored it much. In general it isn't as interesting unless you specifically want to watch passenger traffic.
Another equally iffy spot is the I-95 bridge over the Patapsco; if you are in the rightmost lane or so, going North, the viaduct is plainly seen as you pass. Stopping is definitely not advised.
I can suggest several legal vantage points. You can go to the north side from two points; either enter the Avalon area of Patapsco State Park and hike back (this costs money on weekends except in the winter), or head to the St. Denis station and follow the tracks south (trespassing all the way, of course). On the south side you can park at the Elkridge station. The south side of the bridge over US 1 is interesting in that you can see several decades worth of B&O logos, including some that are very old. To get to the viaduct, go around the other side of the RR bridge and take the first road west. This goes under the viaduct; look for the high water mark from the flood of 1933. Immediately after the viaduct a road doubles back up the hill; this leads to the viaduct. You can walk right up to the end of it.
The junction here was with the old branch into Ft. Meade. For those who like to trace out old railroad grades, you can follow this in your car by continuing east on MD 32 (getting harder as they chew up the roadside). Having crossed the mainline, you can plainly see the old grade at the edge of the trees to your right, up to the point where it turns to cross the road and you can see rails at the edge of the road.Silver Spring, but these have long since been removed, and it is currently to found on a siding in an industrial park, a short ways north of Savage.
Here's how to get there: go North on US 1 from MD 32 or South on US 1 from MD 175. At Patuxent Range Road, turn left if coming going South, or right if going North. Turn into the industrial park on your right and cross the RR tracks; continue to circle the first building on your right until you come back around to the tracks again. Here you should find a sign, and the car and its support cars should be behind the building-- unless it is out on a trip!
For a picture of the car as it appeared in its Silver Spring days (not that it has changed any), click here.mill (now an antique market) are interesting too. (Unfortunately the guy who had a lot of B&O memorabilia is gone.)
The other bridge is a plain old truss which happens to have survived the rails that ran over it (an extension of the Savage spur) by nearly 70 years. If you have Harwood's first book, ignore his directions, because the expansion of MD 32 has changed everything. From Savage, go back out to US 1, go north, and just above the MD 32 interchange, turn left onto Guilford Road. This heads west until it comes to a T, the left branch of which ducks under 32. Turn left and keep your eyes peeled for a very short road on the left which connects the road you're on to a parallel road which is obviously older. It should be the first road you come upon, with a nice big sign for a hike-and-bike trail, and if you get to the light at Murray Hill you've gone too far. Turn off onto this older road (which is the original Guilford Road) and park in the lot. You will see that county parks people have put a rather narrow wooden bridge on the old truss, part of a trail that now follows the old R-O-W back towards Savage. This bridge held the spur into a granite quarry which sat about where-- well, one of the marks of this is how the surrounding landscape is almost nothing like what it was even 15 years ago.Peach Creek Shops, a very nice little model RR store.
You can also drive up to the BWI station or take a MARC train there. This is a great place to watch Amtrak from. It is also a stunningly ugly station. There are shuttle buses from here to and from the airport, from when you can catch the light rail.
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