Disney California Adventure ride reliability

1. 1Guardians of the Galaxy - Monsters After Dark26d 8h lost · 1 breakdown · down on 59 of 59 days 19.3%
2. 2Silly Symphony Swings23d 7h lost · 27 breakdowns · down on 59 of 59 days 21.3%
3. 3Luigi's Honkin' Haul-O-Ween21d 23h lost · 53 breakdowns · down on 59 of 59 days 34.6%
4. 4Luigi's Rollickin' Roadsters19d 2h lost · 59 breakdowns · down on 59 of 59 days 37%
5. 5Mater's Junkyard Jamboree18d 5h lost · 1 breakdown · down on 59 of 59 days 40.5%
6. 6Mater's Graveyard JamBOOree19d 20h lost · 2 breakdowns · down on 58 of 59 days 42.2%
7. 7Toy Story Midway Mania!15d 0h lost · 17 breakdowns · down on 55 of 59 days 56%
8. 8Golden Zephyr9d 16h lost · 113 breakdowns · down on 59 of 59 days 68%
9. 9Guardians of the Galaxy - Mission: BREAKOUT!5d 19h lost · 24 breakdowns · down on 51 of 59 days 80.2%
10. 10Incredicoaster5d 7h lost · 42 breakdowns · down on 59 of 59 days 81.7%
11. 11Pixar Pal-A-Round – Non-Swinging3d 14h lost · 45 breakdowns · down on 53 of 59 days 88.4%
12. 12Pixar Pal-A-Round - Swinging3d 14h lost · 48 breakdowns · down on 53 of 59 days 88.7%
13. 13Goofy's Sky School2d 12h lost · 70 breakdowns · down on 58 of 59 days 90.8%
14. 14WEB SLINGERS: A Spider-Man Adventure2d 13h lost · 83 breakdowns · down on 59 of 59 days 91.1%
15. 15Grizzly River Run2d 13h lost · 54 breakdowns · down on 58 of 59 days 91.4%
16. 16The Little Mermaid - Ariel's Undersea Adventure2d 7h lost · 38 breakdowns · down on 58 of 59 days 92.1%
17. 17Radiator Springs Racers1d 19h lost · 68 breakdowns · down on 58 of 59 days 93.6%
18. 18Inside Out Emotional Whirlwind1d 15h lost · 91 breakdowns · down on 57 of 59 days 94.3%
19. 19Jessie's Critter Carousel1d 13h lost · 59 breakdowns · down on 59 of 59 days 95%
20. 20Monsters, Inc. Mike & Sulley to the Rescue!1d 4h lost · 52 breakdowns · down on 57 of 59 days 95.9%
21. 21Jumpin' Jellyfish13h 1m lost · 18 breakdowns · down on 53 of 59 days 98.3%
22. 22Soarin’ Across America6h 4m lost · 4 breakdowns · down on 48 of 59 days 99.1%

Breakdowns cluster at 8pm, with 114 of the 935 recorded closures starting in that hour - so the ride you most want is safest earlier in the day, not saved for last. A further 200 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. A further 34 closures start in the 9pm hour, when the park is shutting - those are rides finishing their day, not failing, so they are left out here.

The worst day in this window was 29 Jul, when 42.9% of the park's ride hours were lost and 22 of 22 rides went down at some point.