I decided to check out how extensive is the new "bicycle directions" tool on Google Maps by putting in my address in Brooklyn and having it plot a bike route from there to my mom's house in the San Francisco Bay Area. Here's what Google suggested.
I find it super useful to know that if I take the "Cowboy Trail (open segments)" it will only take me 12 days and 5 hours, whereas if I take the route through the Chesapeake & Ohio Canal National Park it will take 13 days and 11 hours. Give or take a flat tire and a rest stop or two.