The San Juans flat? It would depend on your perspective of flat. Our spring trip to Lopez Island was anything but flat in my book. And we had been told that Lopez was the flatter of the islands. I did manage to make it up all but two short steep hills with my fully loaded BOB trailer. I was VERY pleased with myself cause I'm rather a hill weenie. But then again what is a hill to me maybe a slight incline to you. It was a good trip and a fun place to ride. Just be warned it won't be flat. I'm sure you'll have a great time. Hope you do get to see some whales. bikerHen