I didn't go running, but I did go on a 10 mile hike with the Boy Scouts. This trail was ranked a 5 out of 5 for difficulty from AZ trails. I'm very sore, but I had a great time. I don't have a real backpacking backpack. I used my sports backpack. Since I'm such a stud, I was able to haul it the whole way, but I will admit, my shoulders are very sore. And my legs are sore. And my feet are sore. And my head is a little sore from a slight sunburn even though I put on sunblock twice. Maybe I'll post pictures later.