| Date: | 2015-10-01 |
| Time: | 0616 A |
| Geyser: | Grotto |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Time Entered: | 2015-10-01 12:47:34 |
| Time Updated: | 2015-10-01 12:47:31 |
| Time Uploaded: | 2016-08-05 12:31:45 |
| Entrant: | WillBoekel |
| Observer: | Dave M |
| Submitted to: | Geysertimes.org |
| Comments: | Steam started at that time but can't distinguish actual Grotto start on webcam. |