You'll pass these boulders on the way to Purgatory. There is a lot of potential for routes to go up here too especially if you have the patience to clean some of the big flakes off the tall faces.
Until I get a better topo up with other names there will be quite a few routes from quite a few boulders posted in here i'll try to be specific in my descriptions but eventually i separate it all out and make it much more readable
Walk south along the cliff on top of the river until it breaks to the east. walk down into the river feeder staying on the left side. Keep walking until you pass the metal scraps. The corridor boulders should be the first you reach.