Oak Park

This park has everything. It has a 5-12 play structure over sand and a 2-5 play structure over rubber foam. There are regular and toddler swings as well as a climbing structure. In summer, there is a wading pool with life guards from about 12-5. The pool is least busy in the later afternoon hours. This park is located near Cottage Hospital near the Samarkand neighborhood and Westside: https://www.google.com/maps/place/Oak+Park,+Santa+Barbara,+CA/@34.4291165,-119.7173945,15z/data=!3m1!4b1!4m2!3m1!1s0x80e9148d1b1a9409:0x162128e9beb36eee

Pros
There is a variety of play equipment for big and little kids.
The climbing equipment is fun! 
There are bathrooms.
In summer, there is a wading pool. 

Cons
Parking can be tight especially in the summer with the pool.
It is a large park for little kids without any borders.
It can get busy especially in summer with the food program and the pool!
The policy for the pool is to let kids in on the hour when it is at capacity, so you can wait in line awhile.  

2-5 play structure

2-5 play structure (side)

5-12 Play Structure (front) 

5-12 Play Structure (Back)

2-5 play structure (back)

Big Kid Climbing Structure

Wading Pool

Toddler Climbing Area