Unique problem beginning with a steep sidepull move to the "masterlock"--crank your tips in the obvious gash. A strange and obvious "thunder egg" or "geode" feature protrudes from the rock to the right of the gash and makes for an interesting hold should you find you need it. Some people exit right on this problem, utilizing holds at the top of "Black Pinch," but to truly send one must procede straight up and make a somewhat-insecure mantle. Use crashpads, or risk a pounding if you pitch and hit the pavement.
In between "Borson's Left" and "Black Pinch"
BETA PHOTO: Borson's Wall Center Left Topo
BETA PHOTO: Borson's Wall Left Topo
Will takes advantage of the "thunder egg"...
"Masterlock" on the Borson's Wall
Reaching up at the start of the crux on Masterlock...
Euan at the crux of Masterlock (V2), Mt. Rubidoux....