"Rohr route" [sic] is the Rohrer rappel route from the notch down to the base of the wall. It is an alternative to ascending from the notch to the rim and going down the Falls Trail.
[edit to add:]
His name is Tom Rohrer. I don't know why people write "Rohr". He established rappel routes down the Nose, on Glacier Point Apron, and other places. Tom is a climber. He did several first ascents in the Pinnacles in the 50s and 60s. In 2006 he ran the Los Angeles Marathon for the 21st year in a row, at age 70. He posts here sometimes as "MAD BOLTER" (not to be confused with Madbolter or madbolter1).