Browse Map

Explore away

Explore Map Collection

Check out our basemaps

Print a Map Plus

Generate a high-quality PDF

Field Guide

Discover local flora, fauna, geology, and more

Local Flora & Fauna

Learn the ecology of your area

Local Geology

Learn the geologic formation at your feet

Get Started or Sign In

Welcome

Continue with Apple

Already have an account? Sign In

MAP

Topo

Measure

Topo

Ecoregions

Public Lands

...

BASEMAPS

Default Weather

Temperature

Smoke

...

WEATHER

Shadow Mountain Lake

Reservoir in Point Park, Arapaho NF, Arapaho NRA, Rocky Mtn. NP, Front Range in Grand Lake, CO

Colorado Fishing Regulations

Print Map

Generate High-Quality PDF

On the Web

On Wikipedia

Shadow Mountain Lake is a reservoir in Grand County, Colorado, near the headwaters of the Colorado River. Shadow Mountain Lake is created by Shadow Mountain Dam. The lake forms a continuous body of water with Grand Lake, the largest natural lake in Colorado; they are separated by gates. Shadow Mountain Lake is part of Arapaho National Recreation Area. The creation of Shadow Mountain Lake was authorized by the Colorado-Big Thompson bill, passed in 1937, which also created the Colorado-Big Thompson Project. Water from the Grand Lake-Shadow Mountain Lake body is diverted through the Alva B. Adams tunnel, at the eastern edge of Grand Lake, into the Big Thompson River on the east side of the Continental Divide. Storage began in 1947.

Classified As

Reservoir