| Date: | 1997-08-30 |
| Time: | 1544 |
| Geyser: | Grotto |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | 16h06m |
| Standardized Duration: | 16h 6m |
| Time Entered: | 2020-08-29 10:30:02 |
| Time Uploaded: | 2020-08-29 10:30:07 |
| Entrant: | JarnoO |
| Observer: | OFVCL-EV |
| Submitted to: | |
| Comments: | marathon; 1997-08-31: in marathon @ 0020; end 0750 |