Six Flags Discovery Kingdom ride reliability

1. 1Ark16d 0h lost · 3 breakdowns · down on 50 of 50 days 1.8%
2. 2WONDER WOMAN Lasso of Truth11d 13h lost · 31 breakdowns · down on 49 of 50 days 30.1%
3. 3White Water Safari9d 17h lost · 20 breakdowns · down on 50 of 50 days 40.4%
4. 4THE FLASH Vertical Velocity6d 23h lost · 70 breakdowns · down on 50 of 50 days 56.3%
5. 5Acme Fun Factory6d 20h lost · 12 breakdowns · down on 49 of 50 days 58%
6. 6THE JOKER4d 7h lost · 89 breakdowns · down on 50 of 50 days 73.9%
7. 7Kong2d 22h lost · 31 breakdowns · down on 49 of 50 days 82.1%
8. 8Foghorn’s Seaport Railway2d 12h lost · 21 breakdowns · down on 49 of 50 days 85.4%
9. 9Wave Swinger2d 7h lost · 38 breakdowns · down on 49 of 50 days 86.2%
10. 10Monsoon Falls2d 1h lost · 23 breakdowns · down on 49 of 50 days 87.4%
11. 11Boomerang Coast-to-Coaster1d 19h lost · 34 breakdowns · down on 50 of 50 days 88.9%
12. 12Medusa1d 16h lost · 49 breakdowns · down on 50 of 50 days 89.9%
13. 13Cobra1d 13h lost · 37 breakdowns · down on 50 of 50 days 90.7%
14. 14Sidewinder Safari1d 13h lost · 41 breakdowns · down on 49 of 50 days 90.9%
15. 15SUPERMAN Ultimate Flight1d 13h lost · 57 breakdowns · down on 49 of 50 days 90.9%
16. 16Pepe Le Pew’s Rafts of Romance1d 12h lost · 39 breakdowns · down on 50 of 50 days 90.9%
17. 17Taz’s Typhoon1d 9h lost · 9 breakdowns · down on 49 of 50 days 91.6%
18. 18SkyScreamer1d 9h lost · 39 breakdowns · down on 50 of 50 days 91.6%
19. 19Seaside Railway1d 5h lost · 20 breakdowns · down on 49 of 50 days 92.7%
20. 20BATMAN: The Ride1d 4h lost · 36 breakdowns · down on 49 of 50 days 92.9%
21. 21Elmer’s Weather Balloon Service1d 1h lost · 17 breakdowns · down on 49 of 50 days 93.5%
22. 22Thrilla Gorilla23h 52m lost · 24 breakdowns · down on 49 of 50 days 94.1%
23. 23Air Penguins23h 20m lost · 16 breakdowns · down on 50 of 50 days 94.1%
24. 24Seaport Carousel17h 44m lost · 5 breakdowns · down on 50 of 50 days 94.3%
25. 25Congo Queen22h 22m lost · 22 breakdowns · down on 49 of 50 days 94.4%
26. 26Merlin’s Seaside Tours21h 26m lost · 6 breakdowns · down on 49 of 50 days 94.6%
27. 27Boardwalk Bumper Buggies21h 16m lost · 16 breakdowns · down on 49 of 50 days 94.6%
28. 28Nairobi’s Look Out Balloons21h 36m lost · 15 breakdowns · down on 49 of 50 days 94.7%
29. 29Sylvester's Pounce & Bounce21h 43m lost · 18 breakdowns · down on 49 of 50 days 94.8%
30. 30Safari Jeep Tours20h 2m lost · 8 breakdowns · down on 49 of 50 days 95%
31. 31Yosemite Sam's Flight School19h 28m lost · 11 breakdowns · down on 49 of 50 days 95.2%
32. 32Zoe's Tree House17h 59m lost · 7 breakdowns · down on 49 of 50 days 95.5%
33. 33Monkey Business17h 44m lost · 26 breakdowns · down on 50 of 50 days 95.5%
34. 34Scat-A-Bout16h 38m lost · 14 breakdowns · down on 50 of 50 days 95.8%
35. 35Bugs’ Buccaneer15h 20m lost · 11 breakdowns · down on 49 of 50 days 96.3%
36. 36Road Runner Express11h 49m lost · 8 breakdowns · down on 49 of 50 days 97.1%

Breakdowns cluster at 1pm, with 132 of the 896 recorded closures starting in that hour - so the ride you most want is safest earlier in the day, not saved for last. A further 407 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. A further 27 closures start in the 7pm 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 4 Jul, when 43.1% of the park's ride hours were lost and 36 of 36 rides went down at some point.