Got a nifty little booklet that the Jeep rental place put together. It has a list of approved trails that you are allowed to take the 4-door Jeep Sport Unlimited on (not a Rubicon as I had said elsewhere). I'll check when I return it...I think it is all stock except for maybe new tires and rims. Only had 890 miles when I picked it up. I left the booklet in the Jeep but I'll duplicate the basic list here when I retrieve it. Funny thing is...I asked if everything in Arches National Park was OK. Guy said "yep, no problem. Pretty much all paved except for a few places it turns to dirt...but all good."
Well we got on a trail yesterday that was plenty challenging for uninitiated me...and I'm not so sure I'd have wanted to have my Raptor on it. A bit narrow in places and the shorter wheelbase with high clearance was definitely preferred. Some slow speed rock crawling and careful route choices were key. Soft sand steeps with the weight of a Raptor might have been tricky. 4x4 Review I read later recommending airing down the tires at the start. I'll post some pics from my camera later. Anyway, had a blast! and I don't intend to mention it to the rental place. If they care supposedly they have GPS monitoring anyway. Whatever.
So if anyone is game the trail is not named on the park map. One review called it the Four Wheel Drive Road. Here's the info:
http://www.nps.gov/arch/planyourvisit/upload/archmap.pdf
Directions from Main Arches Natl Park Entrance: Drive 16.7 miles northward along the Main Park Road to Salt Valley Road (dirt). Turn left and follow Salt Valley Road 7.7 miles toward Klondike Bluffs til you get to Tower Arch Road. Turn left on to Tower Arch Road. You'll soon come to an uphill rocky section. You can walk up a way and ascertain whether you're committed or not. That is almost as bad as it gets. If you decide to bail, do it before you start as turning back is not really an option on most of the trail. After about 1.7 miles Tower Arch Rd continues on SW-erly while Four Wheel Drive road goes off SE-erly (or to the left). That's it. Stay on the trail for about 9.0 miles...keep your speed through the soft sandy sections. As you approach balanced rock you'll come to Willow Flats Road. Go left and soon you'll be back on the pavement.
Park warns about slippery rock after rain or snow and possible flooding problems in some of the low areas. I'd recommend doing it with 2 vehicles.
This review covers that first part and then some...but I assume is probably indicative of the whole trail I was on.
I'll post that other trail info soon.