380.39 ft USACE project datum
level 0.4 ft above full pool — typical for late August
Reading comes straight from U.S. Army Corps of Engineers Access to Water data (USACE series HKD.Elev-Pool.Inst.15Minutes.0.DCP-rev) and updates live when you load this page.
Hopkinton Lake through the year
The band is the lake's own normal: where the level has run on each calendar day, 1997–2026. 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)
- 2018 (wettest on record)
- 2015 (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 | 380.00 ft USACE project datum · per USACE New England District (Hopkinton Dam) full-pool reference |
|---|---|
| Gauge | USACE series HKD.Elev-Pool.Inst.15Minutes.0.DCP-rev · U.S. Army Corps of Engineers Access to Water data |
| Datum | USACE project datum — Hopkinton Lake sits on a shallow permanent pool: 366 ft is the streambed and 380 ft is the top of the normal pool, both on the project's own datum. |
| Last verified | August 26, 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
What is the lake level for Hopkinton Lake today?
Hopkinton Lake is at 380.39 ft (USACE project datum) as of August 26, 2026 — 0.4 ft above full pool — typical for late August.
Is Hopkinton Lake full?
Yes and then some — at 380.39 ft, Hopkinton Lake is 0.4 ft above its full pool of 380.00 ft (USACE project datum), using flood storage.
What is full pool for Hopkinton Lake?
Full pool (the conservation pool) for Hopkinton Lake is 380.00 ft USACE project datum, per USACE New England District (Hopkinton Dam) full-pool reference. Levels above it use flood storage; levels below it are drawdown.