Six Flags Discovery Kingdom ride reliability

1. 1THE FLASH Vertical Velocity5d 15h lost · 2 breakdowns · down on 17 of 17 days 1%
2. 2Seaside Railway4d 12h lost · 4 breakdowns · down on 17 of 17 days 22.1%
3. 3Ark3d 20h lost · 5 breakdowns · down on 17 of 17 days 31.7%
4. 4Acme Fun Factory3d 18h lost · 4 breakdowns · down on 17 of 17 days 32.2%
5. 5White Water Safari1d 16h lost · 14 breakdowns · down on 17 of 17 days 71%
6. 6THE JOKER1d 6h lost · 49 breakdowns · down on 17 of 17 days 78.2%
7. 7Nairobi’s Look Out Balloons1d 4h lost · 6 breakdowns · down on 17 of 17 days 78.6%
8. 8Bugs’ Buccaneer1d 5h lost · 5 breakdowns · down on 17 of 17 days 79.6%
9. 9WONDER WOMAN Lasso of Truth1d 3h lost · 36 breakdowns · down on 17 of 17 days 80.5%
10. 10Foghorn’s Seaport Railway21h 19m lost · 7 breakdowns · down on 17 of 17 days 84.2%
11. 11BATMAN: The Ride22h 15m lost · 17 breakdowns · down on 17 of 17 days 84.3%
12. 12Boomerang Coast-to-Coaster21h 41m lost · 11 breakdowns · down on 17 of 17 days 84.6%
13. 13Cobra20h 35m lost · 15 breakdowns · down on 17 of 17 days 84.6%
14. 14Elmer’s Weather Balloon Service19h 3m lost · 6 breakdowns · down on 17 of 17 days 86.6%
15. 15SUPERMAN Ultimate Flight16h 23m lost · 33 breakdowns · down on 17 of 17 days 87.9%
16. 16Medusa15h 58m lost · 28 breakdowns · down on 17 of 17 days 88.5%
17. 17Wave Swinger16h 53m lost · 10 breakdowns · down on 17 of 17 days 88.6%
18. 18Sidewinder Safari14h 12m lost · 16 breakdowns · down on 17 of 17 days 89.3%
19. 19Monsoon Falls14h 35m lost · 11 breakdowns · down on 17 of 17 days 89.4%
20. 20Safari Jeep Tours13h 41m lost · 9 breakdowns · down on 17 of 17 days 89.6%
21. 21Congo Queen12h 55m lost · 10 breakdowns · down on 17 of 17 days 90.3%
22. 22Zoe's Tree House12h 39m lost · 6 breakdowns · down on 17 of 17 days 90.7%
23. 23Kong13h 2m lost · 13 breakdowns · down on 17 of 17 days 90.8%
24. 24SkyScreamer11h 50m lost · 20 breakdowns · down on 17 of 17 days 91.6%
25. 25Air Penguins10h 48m lost · 8 breakdowns · down on 17 of 17 days 91.7%
26. 26Yosemite Sam's Flight School9h 37m lost · 7 breakdowns · down on 17 of 17 days 92.9%
27. 27Monkey Business9h 4m lost · 13 breakdowns · down on 17 of 17 days 93.6%
28. 28Merlin’s Seaside Tours7h 23m lost · 1 breakdown · down on 17 of 17 days 94.3%
29. 29Pepe Le Pew’s Rafts of Romance6h 31m lost · 9 breakdowns · down on 17 of 17 days 95.3%
30. 30Thrilla Gorilla6h 9m lost · 5 breakdowns · down on 17 of 17 days 95.5%
31. 31Road Runner Express5h 57m lost · 2 breakdowns · down on 17 of 17 days 95.9%
32. 32Taz’s Typhoon4h 33m lost · 2 breakdowns · down on 17 of 17 days 96.9%
33. 33Boardwalk Bumper Buggies4h 6m lost · 5 breakdowns · down on 17 of 17 days 97.1%
34. 34Scat-A-Bout3h 35m lost · 4 breakdowns · down on 17 of 17 days 97.5%
35. 35Sylvester's Pounce & Bounce3h 33m lost · 3 breakdowns · down on 17 of 17 days 97.5%
36. 36Seaport Carousel3h 0m lost · 1 breakdown · down on 17 of 17 days 97.9%

Breakdowns cluster at 5pm, with 54 of the 362 closures that started before the park's final hour beginning then - so the ride you most want is safest earlier in the day, not saved for last. A further 226 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. The other 35 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 7 Sept, when 27.1% of the park's ride hours were lost and 36 of 36 rides went down at some point.