This monument marks the site of the Blue Cut rest area on Route 66. It also explains a brief history of the Cajon Pass.
Blue Cut was originally a rest area for Route 66. It was named for the bluish tint on the rugged hillside to the south. This bluish rugged hillside is the San Andreas Fault.
In the 1930s, this was also the spot where authorities stopped refugees from the Dustbowl regions of the mid-west that were looking for a better life in California. Refugees were kept here for a few days to a few weeks while authorities did background checks on the refugees.
After the 1940s, many businesses prospered here as travel along Route 66 increased. When I-15 was built in the 1960s, many of those businesses closed and the buildings disappeared.
The monument covers a lot of history in a small space as you can read below.