The cliffs are 90 foot, straight up, barely any side clearance to the tracks in this area:
http://hostthenpost.org/uploads/1507564110e5c4f4b03d2e772b6c3ae0.jpg
It might be called: McGinley's Curve or Whippoorwill Straightline ... Checking ...
6 Horseshoe Curve; MP 242
7 McGinley's Curve (US President visited here at the temporary wooden firetower viewing stand)
8 Whipoorwill Straight Line; MP 243
9 McCann's Curve
10 MG Tower, milepost 243.5 (Mid Grade)
11 MP 244, AG Curve
12 Greenough Curve (PA Governor ?)
13 Brandimarte Curve (Foreman: Gulio Brandmarte)
14 Allegrippus Curve (Fatal wreck of the Loco Alligrippus)
15 Cold Curve
16 MP 246
17 BF Interlocking & Bennington Curve (Bennington Iron Ore Furnace)
18 Salpino Curve (Foreman: Oscar Salpino)
19a Gallitzin Tunnel (east end) SF Interlocking (Sugar Run Iron Ore Furnace)
19a Allegheny Tunnel (east end)
20 New Portage Tunnel (east end)
21 New Portage Branch (out of service...track removed)
http://www.trainweb.org/horseshoecurve-nrhs/gallit-cress.htm
http://www.trainweb.org/horseshoecurve-nrhs/Guide.htm