The Dalles, OR How to get there: I-84 to Hwy 197 (bridge exit, #87). Go south, short .3 miles. Turn Right. and swing down by Big Jim's Drive-In. Road becomes Frontage Road. Continue going 4 miles to Petersburg. Note: after crossing a bridge, take the next road (.2 miles) to the left to Petersburg School, not far down the road on the left.