Hebgen Lake, MT

As of 2026-10-11, Hebgen Lake sits at 6529.89 ft. Over the past 30 days the level has fallen 0.85 ft.

The most recent reading at Hebgen Lake is 6529.89 ft (2026-10-11), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

Readings for Hebgen Lake run from 6529.89 ft to 6534.78 ft over the 174 days on file, which begin 2026-04-21. 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. Hebgen Lake has fallen 0.85 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 Hebgen Lake yet. The published series on this page covers 174 days, from 6529.89 ft to 6534.78 ft. That is not long enough to describe the lake's historical range.