| With a quick glance at your wonderful photos: 
 #6 - Sierra San Francisco. I don't recognize the cave pictographs from the Santa Marta side. So I'm guessing west side.
 When: several centuries before my time, jajaja
 
 #13 - Laguna Percebu - "Shell Island". Sierra San Pedro Martir & Picacho del Diablo in the distance, above the hood of the truck.
 When: sometime after you bought your Tacoma...
 
 #15 - southern Sierra de Juarez, "Pole Line Road"
 When: post-WWII
 
 #20 - Mikes Sky Ranch, northern Sierra San Pedro Martir
 When: After a day of offroading?
 
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