8237.53 ft NGVD29
level 42.5 ft below full pool — unusually low for late September
Reading comes straight from Bureau of Reclamation RISE (Reclamation RISE item 384) and updates live when you load this page.
Is Lake Granby full?
Not quite — 42.5 ft below full pool as of September 22, 2026
How full is Lake Granby? Not as a percentage: no storage figure comes through with this gauge reading, and a share of capacity worked out from the elevation alone would be a guess — how much water a reservoir holds at a given level is a curve only the operator's own capacity table knows. Feet from full pool is what the operator publishes, and it is the figure above.
Lake Granby 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)
- 2015 (wettest on record)
- 2002 (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 | 8280.00 ft NGVD29 · per USBR / Northern Water (C-BT Project) full-pool reference |
|---|---|
| Conservation capacity | 465,600 acre-feet · per USBR / Northern Water (C-BT Project) capacity reference |
| Gauge | Reclamation RISE item 384 · Bureau of Reclamation RISE |
| Datum | NGVD29 — Granby holds 465,600 acre-feet between 8,186.00 ft and the 8,280.00 ft top of the spillway gates. |
| Last verified | August 15, 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 Lake Granby today?
Lake Granby is at 8237.53 ft (NGVD29) as of September 22, 2026 — 42.5 ft below full pool — unusually low for late September.
Is Lake Granby full?
Not quite — at 8237.53 ft on September 22, 2026, Lake Granby is 42.5 ft below its full pool of 8280.00 ft (NGVD29).
How full is Lake Granby?
Not as a percentage: no storage figure comes through with this gauge reading, and a share of capacity worked out from the elevation alone would be a guess — how much water a reservoir holds at a given level is a curve only the operator's own capacity table knows. Feet from full pool is what the operator publishes, and it is the figure above.
What is full pool for Lake Granby?
Full pool (the conservation pool) for Lake Granby is 8280.00 ft NGVD29, per USBR / Northern Water (C-BT Project) full-pool reference. Levels above it use flood storage; levels below it are drawdown.