We went to Ricketts Glen three weeks ago. The PA State Parks
recommended the alternate (487S) route because of the steep grade, when coming in from 118. We are very glad we took the alternate route. The ranger confirmed that 487N is too steep a grade for our motorhome (32') and toad.
I looked up this road in another reference guide mountain directory for truckers which also said to take alternate route. This is the URL for the mountain directory, available in West and East mountain versions http://www.mountaindirectory.com/
Safe driving all.