I started from Briones Road, at about half mile I turned left to the Black Oak Trail, hiked up to the Mott Peak Trail, turned right and continued onto the Briones Crest Trail and to the Table Top Trail. I then took the Crescent Ridge Trail and it became the Seaborg Trail which led me back to the parking lot. My total distance was 7.2 miles with elevation of 1273 feet for a total of 3 hours (moving time was two and half hours). There few muddy spots here and there but overall it was a great hike with lots of scenery views.
I love the trail but its NOT near Riverkern,Ca!! Its in Martinez,Ca! this is my first time using this app. I hope other trails are more accurate...
If you want to feel like in your in Ireland than take a stop here. Amazing.