On Saturday, June 23, I went up from the Peru Creek parking West of Montezuma Colorado, and did most of this run/walk. It was a 15 mile round trip hike in just under 6 hours. The section above Gray's Lake (about mile 7) was very technical and not really good for my running shoes. Really slow going up and then back down to about mile 9. Overall an excellent training hike for moving fast on dirt, gravel and rocks.
Picture with Gray's Peak above me showing hard ground to left ridge.