| Date: | 1996-09-12 |
| Time: | 1230 |
| Geyser: | Grotto |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | 19½h |
| Time Entered: | 2020-08-03 15:01:50 |
| Time Uploaded: | 2020-08-03 15:01:52 |
| Entrant: | JarnoO |
| Observer: | OFVCL-EV |
| Submitted to: | Geysertimes.org |
| Comments: | marathon; 1996-09-12: 0600 ie (from 9/12 marathon, end between 0740 and 0813) |