Do you mean the Monday night ride? That group is FAST. I've ridden with them three times - hung on once, dropped twice
The route is pretty similar but they're a bit different. Their route is:
Start @ Natomas Park Dr.
Right on Garden Highway
Follow it to Power Line Rd
Left @ Power Line Rd
Left @ Elverta Rd.
Left @ Garden Highway
All the way back to Natomas Park Dr.
Sometimes the go left @ San Juan, follow it down to Acevedo and go right. Acevedo becomes Natomas Park Dr. when it crosses W. El Camino. They haven't taken that route during the three rides I've attended, but I've seen them in that area before.
My route is slightly different.
Right on El Centro from San Juan
Right on Power Line Rd.
Left on Elverta
Left on Garden Highway
Left on San Juan
I'll reverse the route, like I did today, based on wind direction. It's good for just under 22 miles.