Six Flags Discovery Kingdom ride reliability

1. 1THE FLASH Vertical Velocity6d 4h lost · 9 breakdowns · down on 23 of 23 days 17.7%
2. 2Ark6d 0h lost · 4 breakdowns · down on 23 of 23 days 18.8%
3. 3Acme Fun Factory5d 23h lost · 4 breakdowns · down on 23 of 23 days 19.5%
4. 4Seaside Railway3d 23h lost · 6 breakdowns · down on 23 of 23 days 48.6%
5. 5WONDER WOMAN Lasso of Truth3d 8h lost · 32 breakdowns · down on 23 of 23 days 54.2%
6. 6THE JOKER2d 1h lost · 58 breakdowns · down on 23 of 23 days 71.9%
7. 7White Water Safari1d 14h lost · 17 breakdowns · down on 23 of 23 days 79%
8. 8Nairobi’s Look Out Balloons1d 8h lost · 8 breakdowns · down on 23 of 23 days 82%
9. 9Bugs’ Buccaneer1d 5h lost · 5 breakdowns · down on 23 of 23 days 84.9%
10. 10Monsoon Falls23h 27m lost · 17 breakdowns · down on 23 of 23 days 86.7%
11. 11Cobra22h 50m lost · 18 breakdowns · down on 23 of 23 days 87.1%
12. 12SUPERMAN Ultimate Flight22h 55m lost · 42 breakdowns · down on 23 of 23 days 87.6%
13. 13Medusa22h 31m lost · 31 breakdowns · down on 23 of 23 days 87.6%
14. 14Sidewinder Safari20h 56m lost · 24 breakdowns · down on 23 of 23 days 88.2%
15. 15Wave Swinger22h 30m lost · 19 breakdowns · down on 23 of 23 days 88.3%
16. 16Foghorn’s Seaport Railway20h 37m lost · 6 breakdowns · down on 23 of 23 days 88.7%
17. 17Merlin’s Seaside Tours18h 13m lost · 3 breakdowns · down on 23 of 23 days 89.5%
18. 18Zoe's Tree House16h 8m lost · 6 breakdowns · down on 23 of 23 days 90.9%
19. 19Pepe Le Pew’s Rafts of Romance15h 23m lost · 14 breakdowns · down on 23 of 23 days 91.2%
20. 20SkyScreamer15h 56m lost · 25 breakdowns · down on 23 of 23 days 91.4%
21. 21Congo Queen15h 10m lost · 13 breakdowns · down on 23 of 23 days 91.4%
22. 22Safari Jeep Tours13h 49m lost · 7 breakdowns · down on 23 of 23 days 92%
23. 23Kong13h 37m lost · 14 breakdowns · down on 23 of 23 days 92.6%
24. 24Air Penguins12h 59m lost · 11 breakdowns · down on 23 of 23 days 92.6%
25. 25Boardwalk Bumper Buggies12h 58m lost · 11 breakdowns · down on 23 of 23 days 92.6%
26. 26Boomerang Coast-to-Coaster11h 54m lost · 14 breakdowns · down on 23 of 23 days 93.5%
27. 27BATMAN: The Ride11h 35m lost · 22 breakdowns · down on 23 of 23 days 93.7%
28. 28Monkey Business11h 19m lost · 18 breakdowns · down on 23 of 23 days 93.9%
29. 29Yosemite Sam's Flight School9h 53m lost · 7 breakdowns · down on 23 of 23 days 94.6%
30. 30Thrilla Gorilla9h 25m lost · 12 breakdowns · down on 23 of 23 days 94.9%
31. 31Elmer’s Weather Balloon Service6h 26m lost · 5 breakdowns · down on 23 of 23 days 96.4%
32. 32Taz’s Typhoon6h 6m lost · 4 breakdowns · down on 23 of 23 days 96.7%
33. 33Sylvester's Pounce & Bounce5h 48m lost · 6 breakdowns · down on 23 of 23 days 96.9%
34. 34Scat-A-Bout4h 50m lost · 8 breakdowns · down on 23 of 23 days 97.4%
35. 35Seaport Carousel3h 27m lost · 1 breakdown · down on 23 of 23 days 98.1%
36. 36Road Runner Express3h 14m lost · 3 breakdowns · down on 23 of 23 days 98.2%

Breakdowns cluster at 4pm, with 70 of the 472 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 272 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. The other 32 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.