Six Flags Discovery Kingdom ride reliability

1. 1THE FLASH Vertical Velocity6d 10h lost · 3 breakdowns · down on 19 of 19 days 0.7%
2. 2Seaside Railway5d 12h lost · 10 breakdowns · down on 19 of 19 days 15%
3. 3Ark4d 16h lost · 5 breakdowns · down on 19 of 19 days 27.7%
4. 4Acme Fun Factory3d 7h lost · 5 breakdowns · down on 19 of 19 days 47.5%
5. 5White Water Safari2d 0h lost · 21 breakdowns · down on 19 of 19 days 69.5%
6. 6Kong1d 22h lost · 14 breakdowns · down on 19 of 19 days 71.4%
7. 7THE JOKER1d 14h lost · 51 breakdowns · down on 19 of 19 days 76%
8. 8Foghorn’s Seaport Railway1d 12h lost · 9 breakdowns · down on 19 of 19 days 76.9%
9. 9Elmer’s Weather Balloon Service1d 11h lost · 9 breakdowns · down on 19 of 19 days 77.6%
10. 10WONDER WOMAN Lasso of Truth1d 10h lost · 41 breakdowns · down on 19 of 19 days 78.5%
11. 11Monsoon Falls1d 9h lost · 13 breakdowns · down on 19 of 19 days 79.1%
12. 12Bugs’ Buccaneer1d 7h lost · 6 breakdowns · down on 19 of 19 days 80.6%
13. 13Nairobi’s Look Out Balloons1d 4h lost · 7 breakdowns · down on 19 of 19 days 81%
14. 14Boomerang Coast-to-Coaster1d 3h lost · 19 breakdowns · down on 19 of 19 days 82.9%
15. 15BATMAN: The Ride1d 3h lost · 21 breakdowns · down on 19 of 19 days 83%
16. 16Cobra22h 55m lost · 15 breakdowns · down on 19 of 19 days 85%
17. 17SkyScreamer22h 5m lost · 28 breakdowns · down on 19 of 19 days 86.3%
18. 18Medusa19h 37m lost · 33 breakdowns · down on 19 of 19 days 87.6%
19. 19Wave Swinger19h 54m lost · 12 breakdowns · down on 19 of 19 days 88%
20. 20SUPERMAN Ultimate Flight18h 12m lost · 34 breakdowns · down on 19 of 19 days 88.3%
21. 21Sidewinder Safari16h 51m lost · 18 breakdowns · down on 19 of 19 days 88.9%
22. 22Zoe's Tree House14h 32m lost · 7 breakdowns · down on 19 of 19 days 90.7%
23. 23Safari Jeep Tours13h 8m lost · 9 breakdowns · down on 19 of 19 days 91.4%
24. 24Congo Queen12h 38m lost · 9 breakdowns · down on 19 of 19 days 91.8%
25. 25Yosemite Sam's Flight School12h 36m lost · 9 breakdowns · down on 19 of 19 days 91.8%
26. 26Air Penguins12h 15m lost · 8 breakdowns · down on 19 of 19 days 91.9%
27. 27Monkey Business12h 5m lost · 15 breakdowns · down on 19 of 19 days 92.5%
28. 28Merlin’s Seaside Tours10h 6m lost · 3 breakdowns · down on 19 of 19 days 93.2%
29. 29Pepe Le Pew’s Rafts of Romance9h 19m lost · 10 breakdowns · down on 19 of 19 days 94.1%
30. 30Thrilla Gorilla9h 12m lost · 7 breakdowns · down on 19 of 19 days 94.3%
31. 31Road Runner Express9h 6m lost · 4 breakdowns · down on 19 of 19 days 94.4%
32. 32Boardwalk Bumper Buggies9h 2m lost · 10 breakdowns · down on 19 of 19 days 94.5%
33. 33Scat-A-Bout7h 37m lost · 8 breakdowns · down on 19 of 19 days 95.3%
34. 34Taz’s Typhoon7h 10m lost · 4 breakdowns · down on 19 of 19 days 95.7%
35. 35Sylvester's Pounce & Bounce6h 31m lost · 5 breakdowns · down on 19 of 19 days 96%
36. 36Seaport Carousel5h 14m lost · 2 breakdowns · down on 19 of 19 days 96.8%

Breakdowns cluster at 5pm, with 88 of the 445 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 231 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. The other 39 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 10 Oct, when 37.6% of the park's ride hours were lost and 36 of 36 rides went down at some point.