What to do on Vashon Island? We get that question all the time. Here are just some of the things to do on Vashon Island Washington. Exploring, biking, motorcycling, horseback riding, tours and much, much more. Vashon Island has so much to do, it is no wonder why people come back to our little island again and again. Just a quick ferry ride away, you are transported to a place that will be in your heart forever.