en-US Rock climbers campaign to access local cliff closed to protect endangered frogs Williamson Rock is a sheer granite wall that rises from chaparral in the San Gabriel Mountains National Monument. Crisscrossed with 300 routes, it has been a proving ground for Southern California rock climbers since the 1960s. But in a move that outraged many in the climbing community, the area... Wed, 10 2018 11:00:00 GMT