The Wonderland Valley provides relatively easy access for a ton of formations in the South Wonderland. Some of those formations will be found on the way to the Wonderland Valley proper, some farther on. This approach info will only serve to get you into the main valley. After parking at Wonderland South lot (the smaller lot northeast of the much larger Barker Dam parking lot), hike up the obvious trail that starts in the NE corner of the small lot. Break left onto the trail that heads north to "Uncle Willie's Health Food Store" (the old house ruins). At Uncle Willie's, find a path straight west (left) to gain the wash proper. A well-worn path will take you up the wash for about 1/2 mile, where the Wonderland Valley starts to broaden and open up. You'll see the very obvious Astrodome formations off to the northwest from this point.