Currently there are 10 named routes on OMSF, and three more on Hollin Wall.
Leave your vehicles at the Green Slabs pullout, MP 10.2, and go up the south-east facing line of rock there following a fairly good uphill path/ streambed to the root of the Greenslabs spine. Continue up a switchback route to the ridgeline, turn SE and follow the ridge about 50 yards. Turn back east and make your way to the hoodoos. The first wall is OMSF proper, and further east is the Hollin Wall. Twenty to twenty-five minute walking time from the highway. Squeezing the Lemmom II,p. 50, has a good general map of this access path.
Browse More Classics in Old Man Stone Face and Hollin Walls
Mountain Project's determination of some of the classic, most popular, highest rated routes for Old Man Stone Face and Hollin Walls:
The Western Cheek 5.9 Trad, Sport, 1 pitch, 75 feet
Fern Gully 5.9+ Trad, 75 pitches, 1 feet
Peripatetic 5.9+ Trad, Sport, 1 pitch, 75 feet
The Black Stain 5.9+ Sport, 1 pitch, 7580 feet
Revocation of Bail 5.10c Trad, Sport, 1 pitch, 80 feet
Devious Septum 5.11a Sport, 1 pitch, 80 feet
Featured Route For Old Man Stone Face and Hollin Walls
From Squeezing the Lemmon: Work up between two small roofs then following discontinuous cracks up to the left margin of the roof band and finish in a fist crack or finish up 3 to 4 feet right by going over the roof....[more] Browse More Classics in AZ