Yes, there are bathrooms and pit toilets all along the way through driving Going to the Sun Road and it is paved the whole way. I've listed out what's available at each stop above. Parking can be an issue at times, so if you're traveling with kids it's best to have someone that can stay in the vehicle if you need to double park to run to the bathroom. The times I've driven this road alone have been interesting when you can't find any parking at the bathrooms for up to 4 hours at a time! Please note I'm not recommending double parking by any means and always be considerate by not leaving your vehicle unattended. It's just one of the only solutions to use the bathrooms sometimes. Also, be aware you may be turned away at Logan's Pass if the parking lot is too crowded.