description Open Book Overview
Open Book is a three-pitch traditional climbing route on Tahquitz Rock in Southern California, rated 5.9 in the Yosemite Decimal System. Royal Robbins made its first free ascent in 1952, and the climb is historically associated with the development of the Tahquitz grading tradition and the early use of 5.9 for a demanding free-climbing route over several pitches.
help Open Book FAQ
Why is Open Book important in climbing history?
Open Book is a three-pitch traditional route at Tahquitz Rock in Southern California. Royal Robbins and Don Wilson made its first free ascent in 1952, and its 5.9 rating helped shape the early Yosemite Decimal System.
What kind of climbing does Open Book involve?
The route follows a prominent dihedral and is protected with traditional climbing gear placed by the leader. Climbers should expect three pitches of crack, corner, and face movement rather than a line of fixed bolts.
What does the 5.9 grade mean on Open Book?
Open Book is historically associated with being the first route rated 5.9 in the Yosemite Decimal System. The grade reflects the standards of early 1950s Tahquitz climbing, when 5.9 represented the hardest end of the scale.
Why is Tahquitz Rock connected to the Yosemite Decimal System?
The grading system was developed and tested around Tahquitz Rock before becoming widely known as the Yosemite Decimal System. Open Book is one of the best-known examples because Royal Robbins established its 5.9 benchmark in 1952.
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