| Date: | 2003-05-31 |
| Time: | 0927 ie |
| Geyser: | Giant Hot Period |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | ~8 minutes |
| Standardized Duration: | ~8m |
| Time Entered: | 2015-01-14 21:15:40 |
| Time Uploaded: | 2019-05-13 21:38:48 |
| Entrant: | Tara |
| Observer: | |
| Submitted to: | Geysertimes.org |
| Comments: | Mastiff surged 3-4 feet. |