Predictions are shown in Mountain Time.
Eruptions cannot be predicted with absolute certainty and estimates are derived from user reports.
Eruptions cannot be predicted with absolute certainty and estimates are derived from user reports.
| Geyser | Prediction |
|---|---|
| Castle |  Jul 12 @ 00:31 ± 1 hour |
| Castle |  Jul 12 @ 01:15 ± 1 hour |
| Riverside | 17:20 ± 40 minutes |
| Grand | 20:47 ± 105 minutes |
| Old Faithful | 18:11 ± 10 minutes |
| Old Faithful | 18:06 ± 13 minutes |
| Great Fountain | Jul 12 @ 00:35 ± 2 hours |
| Daisy | 18:53 ± 15 minutes |
| Grand | 22:00 ± 135 minutes |
| Daisy | 18:53 ± 12 minutes |
| Riverside | 23:47 ± 25 minutes |
Predictions courtesy of:
GeyserTimes National Park Service (*) Prediction derived from double interval