You can use the castor oil granules. Keep in mind that castor oil products don't actually harm moles or gophers, they simply send them scurrying elsewhere. In fact, you can dictate the direction you want them to go.

You can water the granules in if you like, or you can just wait on the rain to do the job for you. Either way, the granules will slowly begin to dissolve and release the scent that repels both moles and gophers. This is an all-natural product containing nothing more than castor oil, soap and corncob granules, which are actually good for the lawn.