776.23 ft NGVD29
level Reading is on the low side for mid-August.
Reading comes straight from U.S. Geological Survey National Water Information System (USGS gauge 14153000) and updates live when you load this page.
Cottage Grove Lake through the year
The band is the lake's own normal: where the level has run on each calendar day, 1980–2026. The summer drawdown — and how this year sits in it — shows up without reading a single number.
This year vs the years that matter
This year's trace against last year and the driest and wettest years on record — the drought-context question every lake regular asks.
- 2026 (this year)
- 2025 (last year)
- 2003 (wettest on record)
- 2021 (driest on record)
Full pool, datum, and the gauge
"Full pool" here means the conservation pool — the level the lake is designed to hold for water supply and recreation, not the flood-control space above it. The full explainer covers flood pool and dead pool too.
| Full pool | not published by the operator |
|---|---|
| Gauge | USGS gauge 14153000 · U.S. Geological Survey National Water Information System |
| Datum | NGVD29 |
| Last verified | August 20, 2026 |
LakeDates reports lake level, not ramp status. Whether a given ramp or marina is usable at this level varies ramp by ramp — call the marina before you tow.
Quick answers
How full is Cottage Grove Lake right now?
Cottage Grove Lake is at 776.23 ft (NGVD29) as of August 19, 2026 — Reading is on the low side for mid-August.
Is Cottage Grove Lake full?
USACE Portland District doesn't publish a conservation-pool figure for Cottage Grove Lake, so this page shows the reading against the lake's own seasonal history instead.
What is full pool for Cottage Grove Lake?
USACE Portland District doesn't publish a single conservation-pool elevation for Cottage Grove Lake. The seasonal chart shows the range the lake actually runs instead.