This trail sounds cooler than it is. The trail follows the San Andreas Fault, which allows you to see how slippage along the fault line has made some gullies discontinuous. It doesn't take long to get the point.
When you get to the first trail junction, you can go three ways. Left allows you to see one of the discontinuous gullies. A sharp right is the main trail to other examples. A soft right takes you along the gully rim for a while before the trail runs out. All three were equally worth doing, so do them all.
To get to the trailhead, you will need to drive a few miles on the dirt portion of Elkhorn Road. That road was passable by passenger cars. However, when I went in April 2021, Simmler Road was impassable, so I had to take Seven Mile Road to get there.
If you're already in Carrizo Plain, I think this is worth the quick stop. I had temps in the 70s, but there's zero shade on this trail, so it would be miserable in hot weather. read more