I bought these for a planned rim to river to rim hike. I ended up rtrtr'ing it two days in a row (long story, but that was not planned} The Scarpa Sparks were fantastic! No hot spots, blisters, or any foot or ankle issues what so ever. I didn't run the trails, I just wanted a light weight hiker with traction and protection, and the Sparks proved their worth and then some.
This review won't help the trail runner, but might inspire light day hikers to give these a try. I can recommend them highly for just that!
This review was written in the old system and had content requirements that are different than reviews written today.