I made a quick trip up to the Dakotas and stayed in Spearfish, SD. They have some really nice trails available right from town and I found some time to do a bit of running. The trails were not all that well marked, but I followed some of the Dakota 5-0 MTB course and since the trails straddle Tinton Road it was easy to use that a datum.
The terrain reminded me a bit of Flagstaff, but closer to the Campbell Mesa area.
If ever in the area, check out the trails in Spearfish. My first time there and I enjoyed the free recreation. Another evening I got to explore the Lookout Mountain area as it was near the hotel. No photos but a good bang for the buck as there are some really steep parts for running.