Our first hike in Zion was a short one - the Emerald Pools. It was a nice start to hiking in the park (the death-defying hike comes later). It was only 3 miles roundtrip with a bit of an incline, but nothing too bad. The payoff - the pools themselves - weren't really that impressive to be honest, but views of the towering rocks nearby and the waterfalls along the trail made it totally worth it. We used our National Parks annual pass to get in, then hopped on a free shuttle from the Visitor's Center. After our hike we only had to wait a few moments before catching a returning shuttle.
Here's a great link to details about the hike, try it out if you visit Zion!
~Paul, Amber, Dad, Susan, Sis