Smith Rock is a 550 foot towering mass of rock just east of Terrebonne, Oregon. The formation originated from an ancient volcanic eruption. A more recent lava flow from the south forced the Crooked River up against its sheer rock face. The result is a spectacularly picturesque site and a rock climber's paradise. More than half a million people visit Smith Rock State Park every year, some to climb the vertical cliffs, others to hike the miles of trails around its base and along the river. Smith Rock could be to Central Oregon what Ayers Rock is to the Australian Outback.