This canyon (the same canyon where our wedding will be held) has lots of great hikes. Some of our favorites are: Dog Lake via Big Water Trail (Moderate-5.2 miles) Gobblers Knob Via Alexander Basin Trail (Hard-4.4 miles) Thayne Canyon Trail (Hard-7.1 miles) There is a small entrance fee ($5 or $6 I think) that you pay on your way out of the canyon.
This is an easily accesible trail with a great lookout over the city. It's rated as a moderate hike and it is 2.8 miles. This is almost 100% exposed, so it will be hot!
Check out some beautiful gardens right at the base of the mountains.
Museum that fuses science, technology, and art in fun exhibits. Located in downtown Salt Lake.