Amazon.com : GopherHawk Single Trap for Gophers and Moles …

TIPS: Look for fresh mounds. The way to find them is monitor the area and when you see a fresh mound pop up, look for the plugged hole (this is where the gopher comes up to gather stuff or push dirt out). If you look at the mound, it may look like a “U” shape. The opening of the “U” is where you will normally find the tunnel run.

https://www.amazon.com/GopherHawk-Single-Gophers-Moles-GH-TRP/dp/B01N06O80F