Lake Billy Chinook, OR

As of 2026-10-13, Lake Billy Chinook sits at 1942.43 ft. Over the past 30 days the level has fallen 1.93 ft.

The most recent reading at Lake Billy Chinook is 1942.43 ft (2026-10-13), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

Readings for Lake Billy Chinook run from 1942.39 ft to 1944.92 ft over the 122 days on file, which begin 2026-06-14. That window is shorter than a year, so neither end is a record for the lake. A lake's range includes a full seasonal cycle, and this gauge has not yet published one.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Lake Billy Chinook has fallen 1.93 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

Year-over-year comparison is not available for Lake Billy Chinook yet. The published series on this page covers 122 days, from 1942.39 ft to 1944.92 ft. That is not long enough to describe the lake's historical range.