Some Sacramento-area parents are already planning out their kids' trick or treating routes. But they're not doing it to score the best candy - they're trying to avoid registered sex offenders.
They're even taking to Facebook to share the state's sex offender map with friends and family.
Luis Patino is the Coordinator of Operation Boo - a statewide program that ensures sex offenders don't have contact with kids on Halloween.
Patino says mapping out a trick or treat path is good, but the California Department of Corrections and Rehabilitation wants parents to know something else:
"Nationally, the number of cases that involve child molestation normally do not happen with strangers," Patino said.
In fact, only 10 percent of child molestation happen with strangers.
"This happens among family members, babysitters, child care providers, neighbors, people who are well-known to the child," Patino said.
Click here for indicators of abuse or signs to watch out for among teens and adults close to your children.
Click here to find the Megan's Law map of registered sex offenders.