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 |
|---|---|
| Great Fountain |  20:18 ± 2 hours |
| Castle |  Jul 10 @ 01:45 ± 1 hour |
| Castle | Jul 10 @ 02:04 ± 1 hour |
| Grand | Jul 10 @ 02:20 ± 105 minutes |
| Riverside | Jul 10 @ 03:49 ± 25 minutes |
Predictions courtesy of:
GeyserTimes National Park Service (*) Prediction derived from double interval