On the 101/1 route from Ventura to Atascadero
Of course, the Coyote Point Course at Lake Casitas in Ventura is a must play, but that is a true destination course. Hard to just drop in and play a quick 18 and leave. This one takes a few hours.
Waller Pines in Santa Maria is the other top choice. A beautiful 27 hole course in a beautiful park. This will take some time, only because it is such a large course spread throughout the park. Either of these would make the detour worth the drive.
However, there are quite a few other courses off the 101 between Ventura and Atascadero. I have played all these courses. I have been meaning to write reviews and add photos, but I get busy.
From South to North
Evergreen Open Space in Goleta is worth a stop. It is 18 full holes and provides a variety of shots. Some of the course is in open park, the rest plays through the woods and back area of the park.
No need to check out the Isla Vista course at UCSB unless you need a quick disc golf break and want to add a course to your play list. Better than no course at all.
Beattie Park in Lompoc is a real treat. I enjoyed this beautiful 18 hole course. The views from the top of the course are amazing. Really fun elevation and possible wind challenges. This is worth the side trip and not really that far out of the way if you are already on the 101.
Once you have played Waller Pines in Santa Maria, you may want to play Preisker Park. It is an 18 hole course that plays around a nice neighborhood park in Santa Maria. Bring a map.
I recommend most all the courses in San Luis Obispo area.
Laguna Lake is an 18 hole course in SLO. That must be a Jekyll and Hyde course. Half the reviewers hate it and half like it. I really liked it. However, I played in December when there was young, green grass that didn't need mowing. Haven't seen it in the summer. Print a map and take it with you!
Shinsheimer is a quick nine that you could stop in and play on the way through. Easy to navigate and fun to play. I wish there was a nice nine hole course like this in my neighborhood!
You should absolutely check out Sea Pines Golf Resort. Even though it is only nine holes and pay to play, it is worth it. This course is really beautiful and well maintained. It is a very long nine hole course as it follows the ball golf course. Not crowded on weekday afternoons. I will definitely be back to the area to play these three courses again. You can do these three SLO courses in half a day.
Be sure to play 18 hole Heilmann Park in Atascadero. It is right off the 101, easy to navigate with a personality all its own.
There is also a 9 hole course at the KOA at Lake Santa Margarita. A real down home campground style course with fairways next to the goats and chickens. I got an Ace on Hole 7! This would make a fun little stop if you needed some fresh air, like a pretty drive or want to add a course to your play list. Otherwise, pass it by.
Going on I-5
I have also played the courses in Taft and Bakersfield. By far the best courses are in Bakersfield at Hart Park. These are two awesome 18 hole courses, each quite different from the other. One in a beautiful grassy park by the Kern River, the other a rugged mountain course with lots of elevation. Not a quick drive by, but an all day adventure.
In Taft, there are two courses. Probably not really worth the side trip unless you are trying to add to your play list. The 18 hole course at Franklin Field is fun. It might not be playable if there are softball games in progress. The A Street park was OK. Small park, small course.
Hope this helps. Enjoy!