Trapline Products
Premium Stainless Steel Traps for Gopher and Mole Control

This video shows methods for locating tunnels, placing traps, and the type of results that can be expected from The Gophinator.
This video shows how to set The Gophinator. 
Basic Procedures for Trapping Gophers
Step 1. Use long screwdriver or other suitable metal rod to probe the earth around the freshest gopher mounds and feel for the "give" where the probe penetrates an underground tunnel.  Most tunnels are located 4 to 8 inches deep, though they may be deeper in some conditions.  Probe around the perimeter of the freshest mounds, or probe along a transect between the freshest mounds.

Note that on sloping ground, tunnels will almost always be located on the uphill side of the gopher mounds. 
Step 2.  Once tunnel has been located, dig out a 6 to 8 inch plug of turf or simply dig a hole down to the tunnel, and remove any loose dirt from the tunnel.    We use a tool called a "hori hori knife", but any good quality trowell or small spade will work well. 
Step 3.   Set gopher traps according to trap setting instructions, and slide set traps, tines first, into the tunnel openings.  If you dig your hole into the side of a tunnel, then you will have two tunnel openings in your hole, and you must set a trap in each of them.  If you happen to dig into the end of a tunnel, then you will have only one tunnel opening showing in the hole you dig, and you need only set a single trap.  Set traps should be slid into the tunnel opening so that the entire trap is within the tunnel.  Add a bit of peanut butter behind the traps (on the trap spring or on the side of the tunnel near where the spring is) as an attractant.  Finally, block off behind the traps by replacing the plug of turf you dug out, or by placing a dirt clod or other object over tunnel openings behind set traps, and then filter some loose dirt over the area of the set to help block out light. 
Video Instructions
We feel that video really provides the best format for showing how to set our gopher traps and how to locate gopher tunnels and place traps, and we encourage you to watch the instructional videos below for a more detailed look at how to use our produtcts