Location: US-16A and Reed St, Keystone Reassurance shield after Highway 40 as we head out of Keystone. We’re on the home stretch to US-16 Location: US-16A and Reed St, Keystone 2 miles to US-16, 20 miles to Rapid City Location: US-16A and US-16, Pennigton Cty As we approach US-16, we’re instructed to stay straight to … Continue reading U.S. Route 16 Alternate, SD-40 to US-16