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Tahquitz Rock (Lily Rock by the USGS) is the epicenter of multipitch climbing in Southern California. With technical routes established as early as 1936, it was the training grounds for many legendary climbers including Royal Robbins and Bob Kamps of Yosemite fame. In fact, the Yosemite Decimal System (YDS), the rating system for climbing difficulty we use uniformly across the United States, was actually invented at Tahquitz in the 1950s and had spread across the US by the early 1960s.
