There are 155.55 miles from Pierre to Keystone in southwest direction and 210 miles (337.96 kilometers) by car, following the I-90 and US-83 S route.
Pierre and Keystone are 3 hours 3 mins far apart, if you drive non-stop.
This is the fastest route from Pierre, SD to Keystone, SD. The halfway point is Kadoka, SD.
Please note the time difference between Pierre, SD and Keystone, SD is 1 hour. The current time in Pierre is 4:40 am and the current time in Keystone is 3:40 am.
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