Location: I-90 and Peaceful Pines Rd, Meade Cty Reassurance shield after the SD-231 interchange. Location: I-90 and Deadwood Ave, Rapid Cty As we enter Rapid City, we’re advised that there are two possible routes to get to Mt. Rushmore via US-16. Location: I-90 and Deadwood Ave, Meade Cty Exit for Deadwood Ave, which is unsigned … Continue reading South Dakota Highway 79, SD-231 to SD-445