APM: N/A Location: Twain Harte Dr and SR 108, Tuolumne Cty No signage as SR 108 Business begins. 108 Business is unsigned along its actual path. Location: Twain Harte Dr and SR 108, Tuolumne Cty In 1.5 miles we’ll enter the actual town of Twain Harte. Location: Twain Harte Dr and Highland Dr, Twain Harte … Continue reading California State Route 108 Business, SR 108 to SR 108