Eds. note, the L->R of the last two routes may not be correct. E. was sorted on a guess, but programming for the website won't allow unsorting.
This area is South of Vail on CO Highway 24 past Minturn and Red Cliff. A couple miles past Red Cliff there is a Hornsilver Campground sign. Park at the campground a locate campsite #4 located on the far North of the campground. A trail leads north then west up the base of the Lower Tier Wall which is the first wall you approach on the trail.
The approach time is about 10 minutes up a steep trail.
There are 2 large boulders next to campsite #4 (as seen in picture with the dog). Shoot to the right immediately after passing the second boulder (about 1-2 o'clock). We marked the trail with a big rock cairn and an arrow made of sticks...as well as a piece of yellow tape on a smaller aspen tree. DO NOT MISS the trail. If you head north up the hillside past the trail, it dumps you onto a loose rock slide and adds a half hour to what should be a 10 min hike.