Question:  Ramona Falls is located in a forest along the trail that is part of the highest portion of which mountain ranges?
Sentence (from "Pacific Crest Trail"): The trail's southern terminus is on the U.S. border with Mexico, just south of Campo, California, and its northern terminus on the Canada–US border on the edge of Manning Park in British Columbia; its corridor through the U.S. is in the states of California, Oregon, and Washington.
Relevant evidence: No