Ceremony to reception

It's one thing if the venue is an hour away and it's for both the ceremony and reception, but I wouldn't want to drive an hour between them. I would avoid that option if at all possible.

This is an unpopular opinion here but I personally would not have a problem with that if those are the two places you really want. I think about an hour would be my personal limit. In my case our venues are 50 minutes apart, but it works a little in our favor by helping kill time in the break between our ceremony ending around 3 (we're also having a 2 pm catholic ceremony) and dinner being served at 5:30 since we did not have an option of a later ceremony time.

Is the reception close to where most guests will be staying? That may also make a difference on whether its too much to ask or not.

I would plan on some people not going to both the ceremony and reception if they have to travel that far, especially if transportation isn't provided.

It is far, but depending on where you're located, there may just not be any other options closer. So if that's what it needs to be, you'll just have to figure it out. As others suggested, maybe hire a bus to take your family to the ceremony and then to the reception. There are things you can do to help with that drive time, you're just going to have to look into it and figure out a plan. Think of it this way, some people have a short drive time but choose to have an extended break between the two for pictures and whatnot. Just be prepared for some people to skip out on the ceremony. If you're not ok with that, you're going to have to choose a different reception venue.

An hour is way too long.