NO. 324 NEW IDRIA MINE - Named for Idria Mine in Austria, the New Idria ranks among the most famous quicksilver mines of the world. Mission fathers, before American occupation, made assays and determined the ore to be cinnabar, mining began in the 1850s, and in 1881 between two and three hundred men were employed.
Plaque located NW corner of State Hwy 25 and Panoche Rd (J1). Site located on San Carlos Peak, from Paicines, 30 mi E on Panoche Rd (J1) to New Idria Rd, then 21 mi S to mine