Ringpin canyon is Black range (lake Mead) canyon just south of Las Vegas. 

It is a low elevation and very short canyon for the area.

There is a 1/2 mile pack raft for the exit but another option is to hard rig the drops and ascend back out.

2 out of the 3 raps I found to be very straightforward to a point where you can climb out with a fixed line.

The canyon itself is very short but did have some meandering passage.

The canyon was completed in around 3 hours time.

This is the perfect canyon for the beginner and a great into to pack rafting