AMP: 2 Location: Bundy Rd and Castle Butte Rd, Yellowstone Cty No reassurance shield as S-568 begins. AMP: 1 Location: Bundy Rd and Hwy 312, Yellowstone Cty Less than a mile later, after we cross the Yellowstone River, we’ll approach old US-312. Turn left as S-568 follows old US-312 east. AMP: 1 Location: Hwy 312 and Bundy … Continue reading Montana Secondary Highway 568, Castle Butte Rd to I-94