A quick two stage multi in Lake Forest.
At the above coordinates you will find a wooden sign that contains a depiction of palm trees on a small island. The bottom of this sign contains a date in the ABCD format. E = the number of palm trees on the wooden sign.
The cache can be found at: N33 37.C(A+D)A W117 42.(B-C)EE
Checksum for the last 3 digits on the north and west is: 21