Hopkinton Lake Water Level Today
New Hampshire · near Concord · In the flood pool
- Elevation
- 380.53 ft
- From full pool
- +0.53 ft
- Percent of pool
- 103.8%
- 24-hour change
- +0.01 ft
- 7-day change
- +0.14 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Hopkinton Lake
Hopkinton Lake is 0.53 ft above full pool, at 380.53 ft, in its flood pool, up 0.01 ft in the last 24 hours. That puts the lake at 103.8 percent of its conservation pool. The top of the flood pool is 35.5 ft higher, at 416.00 ft.
Over the last 7 days the level rose 0.14 ft, and over 30 days it rose 0.21 ft. In the 399 days of readings on this page the high was 386.85 ft on May 15, 2026 and the low was 379.90 ft on Oct 13, 2025, a range of 6.95 ft.
The reading is the U.S. Army Corps of Engineers gauge at Hopkinton Dam, near Concord, taken Sep 21, 2026. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the USACE page for hourly values.
Hopkinton Lake pool elevations
| Current elevation | 380.53 ft |
|---|---|
| Full pool (top of conservation) | 380.00 ft |
| Top of flood pool | 416.00 ft |
| Bottom of conservation pool | 366.00 ft |
| Top of dam | 437.00 ft |
| Inflow | 179 cfs |
| Outflow | 185 cfs |
| 30-day change | +0.21 ft |
| 1-year high | 386.85 ft (May 15, 2026) |
| 1-year low | 379.90 ft (Oct 13, 2025) |
| Operating agency | U.S. Army Corps of Engineers, NAE district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in New Hampshire
- Edward MacDowell Lake 911.27 ft, −0.73 ft from full
- Everett Lake 340.11 ft, −0.39 ft from full
- Franklin Falls Lake 306.83 ft, −0.17 ft from full
Hopkinton Lake level questions
What is the water level of Hopkinton Lake today?
Hopkinton Lake is at 380.53 ft as of Sep 21, 2026, +0.53 ft relative to full pool (380.00 ft). The 24-hour change is +0.01 ft.
What is full pool at Hopkinton Lake?
Full pool, the top of the conservation pool, is 380.00 ft. Above that, water is stored temporarily in the flood pool up to 416.00 ft. The bottom of the conservation pool is 366.00 ft.
Is Hopkinton Lake rising or falling?
Over the last 24 hours the level is +0.01 ft; over 7 days it rose 0.14 ft, and over 30 days it rose 0.21 ft.
Where does this Hopkinton Lake level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Hopkinton Dam. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.