| Date: | 2016-07-20 |
| Time: | 1756 |
| Geyser: | Grotto Fountain |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | 25 minutes |
| Standardized Duration: | 25m |
| Time Entered: | 2016-07-20 17:59:33 |
| Time Updated: | 2016-07-20 22:53:50 |
| Time Uploaded: | 2019-05-13 21:35:16 |
| Entrant: | Scott Grisso |
| Observer: | |
| Submitted to: | Geysertimes.org |
| Comments: | Strong eruption with rainbow sometimes visible in the steam cloud. |