This is a cleaner route than the East Face South side, owing to its position on a more exposed Southern edge of the North slab.
Start just to the right (North) of the opening to the Harmon Cave, on the South end of the East face of the North slab of the Harmon Flatironette. The Harmon Spike is a separate slab that lies 10 meters more to the north of this, across a steep gully, and should not be confused.
Step up onto the slab and go up to the right (North) of the cave opening, and then out over the top of the cave to the South edge of that North slab. Ascend this to the false summit above, and belay, if roped. Continue for a second "pitch" to the summit line and up and left (South) to the true summit of the rock as for the other two routes on this Flatironette.
To descend, scramble to the S/SW as for all routes on this formation.
This route starts just to the right of the opening of the Harmon Cave and goes up and out left to above the cave opening and upward to the top.
A standard light rack.
Extra credit pinnacle on the way.