If you have homeowner's insurance, it should also cover your bike. If you have a really expensive bike, you might want to add a rider onto your homeowners for it (and any other really pricy stuff you own). If you don't own a home, and don't have renter's insurance either, talk to your agent. Last time I had to get a rider on my policy for bikes, it was, like $10 (but that was @ 8 years ago), and it was extra coverage for my son's bike while he took it away to college. Had he left it home, there would have been nothing extra.
As with mud, life, too, slides by.