I ran North Supply Creek on 8-20. It's an O.K. trail for stock vehicles. More equipt vehicles may find it too easy. Therefore, I ran it in my stock 98 4-Runner. I had no problems. The trail is rocky the entire way, but the rocks are not large enough to cause any damage. I would rate it about a 5. It is failrly short as well. Not bad if you're in the area. Lots of wildlife! We encountered many elk and deer. Good area to spend the weekend. Lots to due in Grand Lake.