Red Rock Canyon. It is a formula developed by Sharon Townsend. The formula is available in her dye book "SPNEA'S Historic Colors of America". It is a yummy mixture of brick, caramel and evergreen - all Prochem dyes.
This piece is from a 1/2 yard of Dorr natural that was dyed in a Presto pot with only enough water to cover the wool and NOT stirred. It produces a wonderful mottled red with lights, darks and mediums too!