Pattison Lake
| Pattison Lake | |
|---|---|
Pattinson Lake, viewing northwest, 2025 | |
| Location | Thurston County, Washington |
| Coordinates | 46°59′43″N 122°46′39″W / 46.9952709°N 122.7775103°W |
| Type | Lake |
| Etymology | James Pattison |
| Basin countries | United States |
| Surface area | 257 acres (104 ha) |
| Max. depth | 20 feet (6.1 m) |
| Surface elevation | 161 ft (49 m) |
| References | Geographic Names Information System: 1510726 |
Pattison Lake is a lake in the U.S. state of Washington. The lake has a surface area of 257 acres (104 ha), and reaches a depth of 20 feet (6.1 m). The lake was named after James Pattison, a pioneer settler.
In June 2025, toxic algae was reported at the lake, prompting Thurston County to issue a public advisory to avoid swimming there. Samples collected from the lake detected Microcystins levels above state recreation guidelines. The advisory ended on July 16 after two satisfactory samples.