About 60% of the players in the NHL are from Canada. Even more in the AHL and there are many in the pro leagues around Europe. Californians in the NHL??? I bet there is less than 1%. California has the same population as Canada. That's like asking if Kenyans still run in Kenya. Also, the CHL is the junior development league (makes up three leagues, QMJHL, WHL and OHL) most of the top European players end up in the CHL to get drafted into the NHL, so Canada is still where it is at for hockey.
Pond hockey is still very popular.