We left Moab on Wednesday bound for Grand Junction, Colorado. We had planned to stop about 20 miles out for a short hike (and dog walk) to Fisher Towers, northeast of Moab. We arrived there about 11:00, and with some trepidation, took the "improved dirt road" off Hwy 128 to Fisher Towers, a magnificent formation about 4 miles off the main road. Unfortunately, the "improved" part of the description only lasted for the first 1/2 mile or so. After that, the road became very bumpy, and unfortunately too narrow for us to turn around. When we reached the parking lot, we found that there were so many cars there that we could not turn the truck and trailer around, so we backed down the hill and into an adjacent "campground." The road was so narrow and the turn so sharp that in pulling out we damaged the left rear corner of the trailer on a roadside rock. Fortunately, the damage was cosmetic, not structural, so we proceeded to Grand Junction where we'll spend a couple of days. We hope to tour Colorado National Monument and go fishing on Grand Mesa. We've been told that the mesa top has =/- 300 lakes, and that the fishing is good.