Oooh, good question! When we drove in, we came from the same direction. As far as I can recall, there were not any, it was pretty flat. He should not have anything to worry about. There is a canyon rim drive around the edge of Zion that you may want to avoid though. As long as he stays along the floor of the canyon, he should be OK.

l agree with the first answer. I visited both areas and they are both beautiful. The first area was a breathtaking scenic drive. The main canyon is where lodging, camping, park transportation(bus) and restaurants are located. There's also many hiking trails from easy to strenuous depending on your physical ability and time. Bottom line is that Zions Main Canyon is a major part of Zion National Park. I spent several days exploring in Zions Main Canyon.

I am not sure how busy the park will be in April, as we were there in the fall after school had started. I would think in April, the weekdays would be less busy than the weekends. According to the website, the shuttles in the park begin in March, so you will not be able to drive your vehicle through the main canyon. But, the shuttle system is great to get you from one stop to another. There is never much waiting for the next bus. We preferred it to driving in the main canyon. With regards to the Narrows, we are two fairly fit 50 year olds and we had no problem doing the Narrows. The riverwalk portion is paved and no problem at all. If you are going into the Narrows, you need to rent waterproof shoes and walking poles. I would never attempt it without that equipment. The rocks on the bottom make it very unstable and we appreciated having a solid walking stick. You can rent the night before and return after you are done. About $25 per person. I would allow a couple of hours if you are just doing the riverwalk portion. If you are going into the water, then 4-6 hours. And, you will need to check the day prior to make sure there are no flooding issues in the Narrows and how deep/fast the water is flowing. The other three places you mention are not visible from the road. You need to hike to these locations. But, you should have no problem doing it. Those are all relatively easy hikes. I would estimate a couple hours for each - if you are hiking and stopping to take pictures. They could each be done a bit faster, if you are willing to really "hoof it." Have a great time. We LOVED Zion!

We drove from Vegas to Bryce and Zion and back to Vegas in one day. We left at 6 am and got back around midnight. Both parks are BEAUTIFUL!!!!

Depends on what you want. If you are a casual observer..one day. If you are a hiker and want to see the vast array of nature..at least a week.

Today there was mostly ankle deep water. If there are rainstorms prior to your visit, that could change. The official Park info states most parking outside the visitor center fills up between 9 am and 3 pm, so getting in early would be a good idea.

We did spend one day at each park (Bryce and Zion) and had plenty of time to see the sights and do a little hiking.