Santa Barbara, Ca. recs

I will be traveling to Santa Barbara in two weeks and will be there four nights. Will be there for work but should have two of the afternoons to explore and possibly our last full day to explore. I would love to make a trip up to see the big trees and wondering if that is feasible at all. Will have two other co-workers with me so a long drive is not a problem. If that is not enough time then any recommendations are welcome. I am much more interested in natural beauty than city stuff, FWIW.

Thanks in advance!