Nice day to play around Greylock. Started from the Jones Nose parking area primarily because it is the closest starting point to my house. However, starting here versus Hopper Rd trailhead allows one to run light on the out-and-back to Rounds Rock, as well as chop off the short connection to the Hopper trailhead parking. Because of the heat and humidity I stashed water off of Notch Rd near the northernmost part of the course. I still ended up needing to drink out of the stream along Hopper Trail.
This is a great course with a lot of variety with a nice distance/elevation combination.