Aquifers and spring systems dumping into rivers, or anything like Florida's Weeki Wachee, in California?

Wilderness Tripping
#1

I fell in love in Ginnie Springs and Weeki Wachee in Florida, is there anything like that in California or even Oregon?

#2

Ahjumawi State Park in northeast California comes to mind. There was an article on a trip there in California Kayaker Magazine - issue #10 and can be read online in PDF frmat at California Kayaker Magazine - South West's source for paddlesports information