Alton Towers ride reliability

1. 1Amigos in the Afterlife11d 9h lost · 16 breakdowns · down on 56 of 56 days 33.9%
2. 2Trick O' Treat Town11d 8h lost · 14 breakdowns · down on 56 of 56 days 33.9%
3. 3Edge of the Forest10d 21h lost · 6 breakdowns · down on 56 of 56 days 35.7%
4. 4COMPOUND10d 21h lost · 7 breakdowns · down on 56 of 56 days 35.9%
5. 5Final Exhibit10d 18h lost · 2 breakdowns · down on 56 of 56 days 36.4%
6. 6Altonville Mine Tours: Tiny's Revenge10d 18h lost · 6 breakdowns · down on 56 of 56 days 36.4%
7. 7Gangsta Granny: The Ride8d 11h lost · 30 breakdowns · down on 56 of 56 days 47.4%
8. 8The Royal Carousel8d 9h lost · 16 breakdowns · down on 56 of 56 days 47.8%
9. 9Raj’s Bouncy Bottom Burp8d 6h lost · 21 breakdowns · down on 56 of 56 days 48.9%
10. 10Cuckoo Cars Driving School7d 21h lost · 15 breakdowns · down on 56 of 56 days 51.5%
11. 11Rita8d 18h lost · 48 breakdowns · down on 56 of 56 days 58.5%
12. 12Get Set Go Tree Top Adventure7d 7h lost · 15 breakdowns · down on 56 of 56 days 58.7%
13. 13Skyride to Dark Forest (From Forbidden Valley)6d 10h lost · 51 breakdowns · down on 56 of 56 days 61%
14. 14Skyride to Forbidden Valley (from Towers St.)6d 9h lost · 52 breakdowns · down on 56 of 56 days 61%
15. 15Skyride to Forbidden Valley (from Dark Forest)6d 9h lost · 51 breakdowns · down on 56 of 56 days 61%
16. 16Skyride to Towers St. (From Forbidden Valley)6d 8h lost · 49 breakdowns · down on 56 of 56 days 61.2%
17. 17Spinball Whizzer5d 4h lost · 51 breakdowns · down on 56 of 56 days 72.5%
18. 18Toxicator4d 15h lost · 78 breakdowns · down on 56 of 56 days 78.1%
19. 19TH13TEEN4d 9h lost · 58 breakdowns · down on 56 of 56 days 80.7%
20. 20In The Night Garden Magical Boat Ride3d 13h lost · 27 breakdowns · down on 56 of 56 days 82.5%
21. 21The Curse at Alton Manor2d 16h lost · 37 breakdowns · down on 56 of 56 days 84.4%
22. 22Nemesis Sub-Terra2d 15h lost · 49 breakdowns · down on 56 of 56 days 84.7%
23. 23The Smiler3d 6h lost · 47 breakdowns · down on 56 of 56 days 84.9%
24. 24The Gardens3d 2h lost · 14 breakdowns · down on 56 of 56 days 85.1%
25. 25Octonauts Rollercoaster Adventure2d 20h lost · 44 breakdowns · down on 56 of 56 days 86.8%
26. 26Go Jetters Vroomster Zoom Ride2d 18h lost · 69 breakdowns · down on 56 of 56 days 87.2%
27. 27Galactica2d 7h lost · 57 breakdowns · down on 56 of 56 days 87.8%
28. 28Bugbie-Go-Round2d 13h lost · 21 breakdowns · down on 56 of 56 days 88.1%
29. 29Oblivion2d 14h lost · 46 breakdowns · down on 56 of 56 days 88.6%
30. 30Bluey the Ride: Here Come The Grannies!2d 11h lost · 27 breakdowns · down on 56 of 56 days 88.9%
31. 31Hex - The Legend of the Towers1d 21h lost · 20 breakdowns · down on 56 of 56 days 89.8%
32. 32Runaway Mine Train2d 1h lost · 38 breakdowns · down on 56 of 56 days 90.5%
33. 33Peter Rabbit Hippity Hop2d 4h lost · 24 breakdowns · down on 56 of 56 days 90.7%
34. 34Wicker Man1d 20h lost · 37 breakdowns · down on 56 of 56 days 90.7%
35. 35JoJo & Gran Gran At Home2d 2h lost · 13 breakdowns · down on 56 of 56 days 91.1%
36. 36Hey Duggee’s Big Adventure Badge2d 2h lost · 13 breakdowns · down on 56 of 56 days 91.2%
37. 37Justin's House Pie-O-Matic Factory2d 0h lost · 16 breakdowns · down on 56 of 56 days 91.8%
38. 38Nemesis Reborn1d 14h lost · 48 breakdowns · down on 56 of 56 days 92.2%
39. 39Monorail to Entrance Plaza15h 2m lost · 9 breakdowns · down on 17 of 56 days 97.1%
40. 40Monorail to Hotels & Car Parks12h 40m lost · 10 breakdowns · down on 15 of 56 days 97.4%
41. 41Heave Ho10h 13m lost · 12 breakdowns · down on 56 of 56 days 97.5%
42. 42Marauder's Mayhem5h 29m lost · 6 breakdowns · down on 56 of 56 days 98.9%
43. 43Sharkbait Reef by SEA LIFE3h 1m lost · 1 breakdown · down on 56 of 56 days 99.4%

Breakdowns cluster at 5pm, with 243 of the 1,236 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 990 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 8pm 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 2 Nov, when 42.3% of the park's ride hours were lost and 45 of 45 rides went down at some point.