This is off of "HighSchoolFootballAmerica" site. First time I've read anything from this site, don't know their cred. I do not agree with this top 10 list as there are teams like Bishop Gorman & Mission Viejo missing. Oh... DLS #4, really!? Don't know what algorithm they used but this is their take:
2016 Preseason West Region Top 10
#1 St. John Bosco (California)
#2 Mater Dei (California)
#3 Corona Centennial (California)
#4 De La Salle (California)
#5 Desert Ridge (Arizona)
#6 Folsom (California)
#7 Chaminade (California)
#8 Del Oro (California)
#9 Mountain Pointe (Arizona)
#10 West Linn (Oregon)
2016 Preseason West Region Top 10
#1 St. John Bosco (California)
#2 Mater Dei (California)
#3 Corona Centennial (California)
#4 De La Salle (California)
#5 Desert Ridge (Arizona)
#6 Folsom (California)
#7 Chaminade (California)
#8 Del Oro (California)
#9 Mountain Pointe (Arizona)
#10 West Linn (Oregon)