Granby Reservoir reservoir
Granby Reservoir
Granby Reservoir is a man-made lake located in Grand County, Colorado. The reservoir was created in 1950s following the construction of Granby Dam on the Colorado River. The primary function of Granby Reservoir is to provide water for hydroelectric power generation, agricultural irrigation, and domestic use. The reservoir is fed by several streams including the Fraser River, Willow Creek, and Lake Granby. The surface area of the reservoir is approximately 8,290 acres, and it has a capacity of 539,758 acre-feet. Snowmelt and runoff from the Rocky Mountains serve as the primary source of water for the reservoir. Granby Reservoir also serves as a popular recreational destination for fishing, boating, camping, and hiking.
Daily levels at Granby Reservoir
Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.
Storage
acre-ft · code 17
Pool Elevation
ft · code 49
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Granby Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Colorado River Bl Shadow Mountain Reservoir | 22 cfs | → |
| Colorado River Below Lake Granby | 74 cfs | → |
| Willow Creek Below Willow Creek Reservoir | 7 cfs | → |
| Colorado River Near Granby | 81 cfs | → |
| Grand Lake Outlet Blw Chipmunk Ln At Grand Lk | 34 cfs | → |
| Colorado River At Windy Gap | 142 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Granby Reservoir.
⚓ Boat launches
- Us 34 Grand County
- Cr 6 Grand County
- Grand County
- Hilltop Boating Site
- Willow Creek Boating Site
- Boat Launch Grand Lake
⛺ Campgrounds
- Cutthroat Bay Group Campground
- Stillwater
- Green Ridge Campground
- Green Ridge
- Sunset Point
- Highway 4 Pullout Dispersed Camping
🎣 Fishing spots
- Granby Lake
- Shadow Mountain Reservoir
- Willow Creek Fishing Site
- Watanga Lake - Ipwa
- Lone Pine Lake - Rmnp
- Ten Lake Park - Rmnp
🛶 Paddle runs
- Headwaters To Ends 0.5 Miles Away From Trail Ridge Road
- Headwaters To Ends 0.5 Miles Upstream From End Of County Hwy 115
- Begins 0.5 Miles Away From Trail Ridge Road To Ends Where River Segment Exits Rocky Mountain National Park
- Headwaters To Ends 0.5 Miles Upstream From End Of Fern Lake Road
- Begins 0.5 Miles Upstream From End Of County Hwy 115 To Eastern Boundary Of Rocky Mountain National Park
- Headwaters To Fan Lake
Track Granby Reservoir in the Snoflo app
Save this reservoir as a favorite and set push alerts when storage crosses a threshold (e.g. "alert me at 80% of normal").
About Granby Reservoir
Where does the data for Granby Reservoir come from?
Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.
What does the Hazard hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Granby Reservoir.