Ichty has the right method. Have killed many of the little devils with just that method. A couple of refinements that I use. I actually use a collander to sprinkle the loose dirt back in over the trap. It produces a nice uniform layer that the mole happily pushes through. The other thing I do is to wear gloves when handling all equipment. Ichty is right about the hallway. I will generally not place the trap at a mound, I will draw a line between two mounds and probe the ground along that line with a screwdriver to find the tunnel. Then that is where the trap goes. One other thing, when you get a mole, bury it right in the tunnel, they are very territorial and no mole will come back until the dead one has decomposed. Generally, one mole will claim about 1/2 acre as their territory (at least around Puyallup).