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 |  Apr 26 @ 23:52 ± 1 hour |
| Great Fountain | 05:18 ± 2 hours |
Predictions courtesy of:
GeyserTimes
National Park Service (*) Prediction derived from double interval