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The Borson's area contains some of the best moderate and most easily accessible bouldering at Rubidoux. All the problems are located no more than a few yards from the access road that is situated just to the East of the summit cross.
Walk up the access road towards the summit. Close to the summit on the East side you'll see the obvious bridge and tower. This is located at the north end of the area.
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Mountain Project's determination of some of the classic, most popular, highest rated routes for Borson's Area:
Featured Route For Borson's Area
Masterlock V3- 6A CA : Inland Empire : ... : Borson's Wall
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...[more] Browse More Classics in CA
Local Information for Borson's Area