End of Mountaire Parkway near Regency Gate trailhead in Clayton. You can also park at the end of Regency Drive and you can search for "Regency Gate Trailhead" on Google Maps if using GPS.
We will be hiking up "Back Creek" fire road to a cross trail then back down on Donner Canyon fire road.
This is a short and low intensity hike. Distance is 4-5 miles and it should take around 2-3 hours. Bring water and comfortable hiking shoes.