Pacific Serena homes in Encinitas are served by the following public schools

Park Dale Elementary School.  I know what you're thinking and you are right, the school boundaries are pretty screwy, being this far West you'd think that the elementary school would be much closer.  Here is a map to put you on target:

Oak Crest Middle School.  This is more like it and located at the top of the hill less than one mile away and walkable.