I ran in from the Ice Age Trail Esterly Road parking lot and then jumped on the John Muir Trail around Sandy Bottoms and ran counterclockwise. The Strava is slightly more than one lap since I wasn't sure where the start point was. Based on Strava one lap was 1:29:00.
This was the full blue loop including the Gnome Loop in the northeast corner. That section of thee blue loop is needed to get in the 11.5 mile ball park this route is listed as. Without that loop it is under 10 miles.
It was the first hot day of the year and I definitely suffered. I didn't carry any water with me. About 30 minutes in I felt dehydrated and overheated and was more surviving than running fast.