Orange County Railroad Branchlines - Good group specific to local operations for Orange County, CA and mention of operations that extend to Los Angeles. Focus in on Union Pacific, but BNSF locals are also discussed here.

BNSF Modelers - Discussion board for modeling the Burlington Northern and Santa Fe Railroad.

Cajon - Discussion and Photo group. Focus on the Cajon Pass in Southern California from current operations to historical interest.

Calrailfans - Large discussion group with many planned events in California and wide range of operations in California.