H3s right? I've been very curious about them lately in terms of off-road capability. Where is that? Reminds me a lot of Cleghorn Ridge in CA.
I was the only one in an H3, the other 3 were in H2's. The trail in the video is Nightmare Gulch and out through Last Chance Canyon in Mojave. It's not in books(Nightmare Gulch), although the ridge top trail is(nightmare gulch overlook trail). I believe some sites have rated it 5-6. It's an awsome trail. Takes about 6-8 hours to drive 12 miles.
The photo is Rhower Flats OHV in Santa Clarita. Fun shorter trail, not too bad except for the hill I was decending in the photo which has a bypass. One of my freinds rolled his H1 on that same hill

he wasn't listening to spoters though.
H3 capability... As good as a lot of modified rigs, but not as good as an extreme rock crawler rig. They do have a weekness in the front diff unless you get the alpha package or upgrade to the cast iron front differential( $1,000-1,500 upgrade).
Overall, I've done some of the tougher trails in SoCal that can possibly be done in a none rock crawling rig and never have been disappointed or had problems, but to be honest, some of my friends in NorCal have broken their front diffs on trails like fordyce Rubicon ect.
BTW Dave,
Hummer X club welcomes all capable rigs memebr or non member. ALthough it was started as a Hummer club, a good portion of the trail riders do not drive Hummers anymore. Theres trips almost monthly. Check out the forum if you want to go on a trail run. Its a great group of people and the trips are always fun.