Marys Lake reservoir
Marys Lake
Marys Lake is located in Estes Park, Colorado, and was named after the wife of an early settler in the area. The lake is fed by snowmelt and runoff from the surrounding mountains, and is part of the Big Thompson River watershed. The lake is approximately 15 acres in size and has a maximum depth of 30 feet. The surrounding area is known for its recreational activities, including fishing, boating, and hiking. The lake is also used for irrigation purposes by local agricultural communities. During the winter months, the snowpack that accumulates in the surrounding mountains provides a critical source of surface flow to the lake and the surrounding areas. Marys Lake is an important part of the region's hydrology and plays a vital role in supporting both agricultural and recreational activities in the area.
Daily levels at Marys Lake
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 Marys Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| St. Vrain Creek At Lyons | 56 cfs | → |
| Grand Lake Outlet Blw Chipmunk Ln At Grand Lk | 34 cfs | → |
| South St. Vrain Creek Near Ward | 24 cfs | → |
| Colorado R Below Baker Gulch | 98 cfs | → |
| Grand River Ditch At La Poudre Pass | 31 cfs | → |
| Colorado River Bl Shadow Mountain Reservoir | 22 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Marys Lake.
⚓ Boat launches
- Boat Launch Grand Lake
- Hilltop Boating Site
- Grand County
- Us 34 Grand County
- Cr 6 Grand County
- Lagerman Trail Boulder County
🎣 Fishing spots
More fishing →🛶 Paddle runs
- Begins 0.5 Miles Upstream From End Of Fern Lake Road To Eastern Boundary Of Rocky Mountain National Park
- Begins 0.5 Miles Upstream From End Of County Hwy 115 To Eastern Boundary Of Rocky Mountain National Park
- Gnar Section
- Headwaters To Ends 0.5 Miles Upstream From End Of County Hwy 115
- Main Section
- Nsv
Track Marys Lake 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 Marys Lake
Where does the data for Marys Lake 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 Marys Lake.