How often does Big Thunder Mountain Railroad open on time when the park opens? This is different from mid-day reliability: opening delays are typically caused by overnight maintenance, morning inspections, weather checks, or ride systems that need time to warm up. A ride can be perfectly reliable once running but still open late.
Based on 1789 operating days of 5-minute monitoring.
On the days Big Thunder Mountain Railroad doesn't open on time, how long do you have to wait?
| Typical delay (median) | 30 min |
| 75th percentile delay | 280 min |
| Bad day delay (90th percentile) | 430 min |
| Average delay | 170 min |
Does this ride open more reliably on certain days?
| Weekday on-time rate (Mon-Fri) | 86.8% |
| Weekend on-time rate (Sat-Sun) | 87.2% |