22m. Start up the rib between Barney Rubble and Thread Flintstone. Make a hard move to gain the good holds by the second bolt of Barney Rubble. Head for the third bolt of Boogie On Down. From this make some moves onto the head wall until you gain the thin pockets (mono). Stay on the left side of the rib and finish direct, which is rated as 7b, and is now properly bolted (in 2019).