2023 Trout Derby lake
Starting soon! For more information about how the trout derby works, important dates, and prizes, visit the 2023 Trout Derby page.
Located about two miles east of Walla Walla, and formerly known as Mill Creek Reservoir, this 50+ acre body of water has a year-round open fishing season. Bennington Lake offers good bank access and a boat launch, however, internal combustion engines are prohibited. This popular impoundment receives multiple plants that total over 15,000 catchable-size (10-12 inch) rainbow trout , 625 jumbo size (14 inch or larger) rainbow trout, plus an additional 500 larger triploid rainbow trout weighing between 1 Â½ to 2 pounds. Only two trout over 13 inches may be retained as part of the five trout daily limit here. Some warmwater species are also present.
This lake is filled each spring by diverting flows from Mill Creek. However, this diversion only occurs after the flood threat from snow melt and heavy rains has declined. Thus, the lake level is often not raised and stocking with trout often does not occur until mid or late March. The bottom of the lake loses water after water withdrawals from Mill Creek cease in early summer (to maintain Mill Creek flows and protect stream fish species such as steelhead and bull trout are both listed under the Endangered Species Act, and Chinook are reintroduced). Therefore, the lake level declines through the summer and by fall it appears that it was drawn down as flood water storage during the winter and spring (the primary purpose of this lake is flood control). Fishing is very limited after mid summer because of the recession of the lake level and access can be difficult to the low water levels by fall.
Two-pole fishing is allowed
Shoreline access: Good - This is US Army Corps property for public recreation
Species you might catch
County: Walla Walla
Acreage: 39.40 ac.
Elevation: 1199 ft.
Center: 46.065562, -118.260595
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Catchable fish plants
|Stock Date||Species||Number Released||Number of Fish Per Pound||Facility|
|Jul 1, 2022||Rainbow||2,250||2.5||TUCANNON HATCHERY|
|Jun 22, 2022||Rainbow||2,550||2.5||TUCANNON HATCHERY|
|May 26, 2022||Rainbow||1,138||2.5||TUCANNON HATCHERY|
|May 24, 2022||Rainbow||2,550||2.5||TUCANNON HATCHERY|
|May 17, 2022||Rainbow||300||0.64||TUCANNON HATCHERY|
|May 16, 2022||Rainbow||2,550||2.5||TUCANNON HATCHERY|
|May 9, 2022||Rainbow||300||0.64||TUCANNON HATCHERY|
|May 4, 2022||Rainbow||2,550||2.5||TUCANNON HATCHERY|
|Apr 22, 2022||Rainbow||2,675||2.5||TUCANNON HATCHERY|
|Jun 16, 2021||Rainbow||2,550||2.5||TUCANNON HATCHERY|