So I'm poking around online looking up things like "moles seattle" (expecting to get a lot of stuff about skin cancer, but no, the first several hits were all very helpful). This page suggests a variety of violent and not-so-violent home remedies including mole-fishing with a pitchfork ("moles move at 12-15 miles and hour. Be vigilant." Yuk!), razors and gasoline in the tunnels (um, no), or (my favorite) chocolate exLax.
Here's another interesting cure, originally posted here:
I have a cure for moles: Bury fresh dog poop in each new mole hill or tunnel. The bigger the dog and the fresher the poop, the better. Then water it, so it sort of melts and spreads down the tunnel. Moles know a predator when they smell one — they'll move to the neighbor's yard. If you don't have a dog — well, great! Your yard is where I send my moles.
I don't have a dog. But Mike has a few. Hrm.