Reservoir Report

Horsetooth Reservoir reservoir

Colorado, USA USBR
Today high
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Tonight low
--
Current storage
140,519acre-ft
% of normal
10%
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Right now · current storage
Horsetooth Reservoir
USBR · 100091
140,519 acre-ft
As of 2026-05-12
Seasonal avg
127,751
Record max
157,000
24h change
0.0%
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Horsetooth Reservoir -- None reservoir
Horsetooth Reservoir None
About this reservoir

Horsetooth Reservoir

Horsetooth Reservoir is a popular recreational area in Colorado, located west of Fort Collins. The reservoir was constructed in 1949 by the Bureau of Reclamation for irrigation purposes, and it has since become a significant source of water for the region. Horsetooth Reservoir is fed by several streams, including Spring Creek and the Cache la Poudre River, which provide the majority of the surface flow. Additionally, snowpack from the surrounding mountains contributes to the reservoir's water levels. The reservoir is used for various recreational activities, such as camping, boating, fishing, and hiking. The water is also used to irrigate agricultural land in the area, supporting the local farming industry.

StateNone
OperatorUSBR
Site ID100091
Percent of normal10%
Last updated2026-05-12
Records since1951
Storage trends

Daily levels at Horsetooth 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

Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Horsetooth Reservoir -- inflows here typically show up in storage 24-72 hours later.

Track Horsetooth 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").

FAQ

About Horsetooth Reservoir

Where does the data for Horsetooth 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.

More reservoirs

Other water bodies near here

Snoflo-tracked reservoirs and dams within driving distance of Horsetooth Reservoir.

Premium feature

Favorites and alerts are part of Snoflo Premium. Save reservoirs, set storage thresholds, and get push notifications when conditions cross.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.

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