Lake Granby Water Level Today: 8,240.41 ft, 54% Full
Lake Granby is 8,240.41 feet, 54% full, with 289,442 acre-feet stored and down 1.29 ft over 7 days. Includes current source time, threshold context, and related reservoir links.
This page tracks Lake Granby elevation, storage, percent full, recent movement,
and source information for readers checking current water conditions.
Lake Granby is currently at 8,240.41 feet,
54% full, with
289,442 acre-feet stored, down 1.29 feet over the last 7 days.
Latest reading: 2026-09-07.
Lake Granby reference levels
- Top of active conservation: 39.59 feet below 8,280 feet.
- Spillway crest: 19.59 feet below 8,260 feet.
- Top of inactive: 54.41 feet above 8,186 feet.
- Top of dead: 65.78 feet above 8,174.63 feet.
Lake Granby historical position
The lowest point in the available West Water Watch history is 8,240.41 feet on 2026-09-07. Today's reading is 0.00 feet above that mark.
Related Lake Granby water level checks
Lake Granby access and boating checks
Lake Granby water-level searches often include boating, ramp, and local recreation intent. Verify official access pages before launching because ramp availability can change with water level, inspections, staffing, and seasonal operations.
Lake Granby water level today
What is the Lake Granby water level today?
Lake Granby is currently at 8,240.41 feet, with 289,442 acre-feet stored.
How full is Lake Granby?
Lake Granby is 54% full based on the latest storage snapshot.
Is Lake Granby rising or falling?
Lake Granby is falling, down 1.29 feet over the last 7 days.
When was Lake Granby last updated?
Lake Granby's latest reading is dated 2026-09-07 from USBR RISE API.
What storage band matters for Lake Granby?
Lake Granby's inactive pool threshold is 8,186 feet. Current elevation is 8,240.41 feet.
Is Lake Granby rising or falling?
Lake Granby is falling 1.29 feet over the 7-day window.
Lake Granby is falling 6.5 feet over the 30-day window.
Lake Granby operating context
Lake Granby is a major storage feature of the Colorado-Big Thompson Project in Grand County. Its page emphasizes active, inactive, and dead-storage references because those bands explain the available storage space more accurately than a generic drought label.
The 8,260-foot spillway crest is a structural reference, not a shortage trigger. Read the current elevation against the 8,186-foot top of inactive storage and the 8,280-foot top of active conservation, then use recent movement to see whether that buffer is growing or shrinking.
What to watch at Lake Granby
- Buffer above inactive storage
- Distance below top of active conservation
- Recent movement within the Colorado-Big Thompson storage cycle
Current Lake Granby conditions
- Latest reading
- 2026-09-07
- Current elevation
- 8,240.41 feet
- Current storage
- 289,442 acre-feet
- Percent full
- 54% full
- Seven-day elevation change
- -1.29 feet
- Thirty-day storage change
- -35,911 acre-feet
- Source
- USBR RISE API
- Source updated
- 2026-09-07
- Current water level and storage snapshot
- Recent elevation trend and seven-day movement
- Percent full and source context for Upper Basin