The trail down appears to be part of an old ATV trail but now closed to motorized traffic. The forest begins to change to Aspen and Douglas Fir as the trail descends. Near the bottom of the canyon there was a point where I got confused. The old ATV trail continues south down to Chicken Creek while the Rim Trail moves north parallel to the creek.
I joined the Chicken Creek Trail somewhat to the south of the official junction after a short search. The route I took might would also be good if you wanted to hike south on Chicken Creek to the trail head at Jackson Lake.
The Chicken Creek Trail continues north mostly on the west side of the creek with a couple of creek crossings. The forest on the west side of the canyon has more Ponderosa Pines instead of the Douglas Fir and Spruce that dominate on the east side.
The Chicken Creek Trail merges with the Morrison Trail that has a trail head at Bear Creek along Highway 145 north of Dolores, only eight miles by trail but about 40 miles by road.
Climbing out of the canyon there is a great view of Mt. Hesperus and the LaPlatas looming above the campground area. There are more good views from the Rim Trail on the segment running south from the campground. It took me 3:00 hours to cover this five mile route.