Supercrack and The Corridor 

Can anyone who's been there possibly post more about how to get to this spot?

Stephan, Park in the dirt lot on north side of Iron Springs Rd. just west of Peterson's Physical Therapy and the Prescott Animal Hospital. Hike east and a little north, following old trails and a drainage that leads to the rocks. Too far left and you'll end up in a housing area, too far right and you'll end up following the base of a rocky hill that leads to the back of the mall. If you are in the right drainage, the Supercrack boulders, etc. will be high on the right, and various other boulders will be on the left. Another route would be to try and gain the old dirt road that heads west from the back of Walmart, although I think new fences and security might make this difficult. At its west end is the Supercrack area. On Google maps the road is clearly seen and might help you get an idea where the rocks are located. This stuff is in the new guide.