A little hidden gem of Utah, I think, is Capitol Reef National Park but I also believe it's popularity is growing. I went there twice in 2015 and loved the scenic drives just as much as the great hikes. The first trip was helping take a LDS Young Women's group through some canyons and then later in the year I went with some friends on a leisure trip. I was lucky to go, both times, with a group of people who are familiar with the area and go canyoneering quite often throughout Southern Utah. It's a great place for a weekend trip or longer.
National Park Website
Utah State Website
Casidy Arch - Hike and Canyoneering
If you look close, the red spot under the tree is the person setting up the first rappel down under the arch.
Looking up at the arch.
Wife Three - Canyoneering
"Utah! Bringing people together. UTAH! What a GREAT PLACE TO LIVE!"
Looking up at the first rappel - 200 feet.
I had to climb down this gap in the rocks by just wedging my body in between the two rocks on each side.