H-Rock or Jack's Mailbox Peak is short but very steep, but you will get a great view of the Salt Lake City Valley and you can get a good look at the whole valley too.
This is a great leg work out if that's what you are aiming for. I did run this trail through the switchbacks and it's pretty hard, but I made it and went 10 miles the other way.
The elevation gain I got was 1012. So it's pretty steep for a short hike too.
