My husband David and I are members of the Pasadena Radio Club (PRC) where we participate each June in PRC's Field Day.
In September for many years we did finish line communications for The Angeles Crest 100 mile endurance run (AC100).
The Baker2Vegas (B2V) relay race is held in April and we do communications at the Pahrump NV checkpoint for the Crescenta Valley and Temple City Sheriff teams.
Dave also helps with several other smaller scale races.
We also have regular involvement with Los Angeles County Disaster Communications (DCS)
Pasadena used to have Arson Watch patrols and in 2000 there was a newspaper writeup about it.