The Riverside Walk (Gateway to the Narrows) is a nice little paved trail in Zion National Park that starts at the Temple of Sinawava and takes you along the river bank to the mouth of the canyon that takes you into the Narrows hike.
This hike is a perfect one for families with kids that want to explore the canyon, and still be a safe distance from the river. If you want to get to the river, you can do that too! It is even stroller and wheelchair friendly.
Don’t miss the little pool and the hanging gardens along the way!