I was in St George last week and hauled the bikes down. We were originally going to ride the I-15/Fort Pierce wash area but I got a nail in my tire about 4 miles in. I sent my son and nephew on with a friend of mine and did a little loop while I rode back to the truck.
We got back and I pulled the tire off the rim, ran up to Pro Cycle/Rocky Mountain ATV dealership and bought a new tube and 15 minutes later had it back on ready to go. I have done enough tire changing that I have a system down for it. I actually replaced a front tire on a bike too this weekend.
Saturday we headed to run the Toquerville Falls trail because two of the guys had not ridden it yet. There are a few loose climbs but on top it has some really fun whoops on it. It was really dry though.
I could load the GPX file if I knew how to do it but I dont. Here is a link to it
http://alltrails.com/tracks/toquerville-trail-40613
you can save it and open in Google Maps if you want. We ended up dropping down to the mail dirt road and then back on the highway. The little bikes didn't have enough speed to make it up some of the hills required to go back on a trail but you could easily back track from the falls the way we came.
Here is the falls
This trail is located on the road from LaVerkin to Zions. As you make the turn at the Maverik in LaVerkin heading to Zions you climb up and there is a hair pin curve in the road and as soon as you come around that corner, off to the left is a gun range. You park there and head northeast. Fun trail for sure.
I am so going broke 
