Cool stuff- you should share the story you told us about your 4 hr Vail offroad trail experience.....
You mean 4 hours "of" off-road experience (hah)!
Anyway, instead of prattling on with my tales let me provide some useful information about this trail in case anyone wants to check it out for themselves. The mountains of the Gore Range are quite different from the San Juan’s. Not as dramatic or as jagged, but still very beautiful in their own way. In addition, the trail starts at Camp Hale which was the original training ground for the 10th Mountain Division in their effort t to defeat the Nazis in the Alps. There are some very cool historical sites along the trail if you are into that sort of thing (I am). Camp Hale is just south of Red Cliff, CO which is perched on a ledge high up the Eagle River Gorge
(https://en.wikipedia.org/wiki/Red_Cliff_Bridge). Camp Hale is an easy drive from either the Vail Valley to the North or from Leadville to the South (20-minute drive from either side roughly).
In Charles Wells' book, "Guide to Colorado Back Roads & 4-Wheel-Drive Trails", he rates McAllister Gulch as a "Red-Difficult" trail. However, he only covers the McAllister Gulch up and back section (CR 708). We drove the "full loop" starting at Camp Hale, we took CR702 to the top of Ptarmigan Pass, then CR747 from Ptarmigan Pass off the backside of Resolution Mountain until CR747 intersects with CR708 down near Red Cliff, and then CR708 up over Resolution Mountain again and back down to Camp Hale. Here is my tracking data from Gaia
GaiaGPS - McCalister Gulch Loop (7/15/20, 11:58:35AM). You do two climbs and two descents of around 2600 feet each. The part in the "back" on CR747 where you run into the Wearyman Creek section gets wet and very tight. In fact, in one section it was so tight that a mountain biker who had caught up to me had to follow me for a few hundred feet before he had enough room to get around. Great guy from Red Cliff who happened to grow up in the very suburb of Austin, TX where we currently live (small world). He took the videos of us crossing Wearyman Creek. Now I have a new friend in Red Cliff!
CR702 is a very easy scenic drive up the mountain tp Ptarmigan Pass. Things get interesting about halfway down CR747 and then all the way to the descent on CR708 back to Camp Hale. You drop down from above the tree line at Ptarmigan Pass to an immediate very on-camber berm, then work your way through ever-tightening forest tracks and creek beds, and then back up steep moderately rocky switchback climbs up to the top of Resolution Mountain. We ran into a sheepherder at the top (~11,800 feet) who was camping and watching a flock of sheep. At almost 12K feet! Crazy. We chatted with him to make sure he was all good and to make sure we were not heading for disaster. The descent to Camp Hale contains one crux section where you make a step descent between two large rocks while making a sharp left turn. Then you are home free. I ran into a local professional Jeep guide at the start of the trail who suggested that my truck could make the loop and then ran into him again as we were finishing and he seemed shocked that we actually made it. I kind of was too as I foolishly took his advice and drove off into the unknown, solo, and without adequate comms. Oh well, we survived the trip and I learned A LOT about the capabilities of these trucks. These damn things are amazing. I still cannot believe you can knock out 800 plus highway miles in a single day, with ease, and then cross just about any pass in the state. You can’t do that in a Jeep! I hope someone will check out this trail. It's a good time. I will definitely hit it again when I am in the area. It will be more fun the next time because I won't feel like I am driving my family off the edge of the earth.
For the record, I drive a '98 LX on 35" Falken Wildpeak M/Ts, OME springs, Icon Stage 2 shocks, 2.5-inch lift, NItro center diff low range kit (awesome!), no front or rear lockers, with a Tepui on the roof. There are some low tree sections where Aspens had fallen across the trail, but the Tepui showed no signs of wear.