Shadow Mountain Reservoir

Shadow Mountain Reservoir, located between Lake Granby and Grand Lake, acts as a conduit to transport water pumped from Lake Granby to Grand Lake and the Adams Tunnel via the Granby Pump Canal.

The North Fork of the Colorado River enters Shadow Mountain Reservoir near the Pine Beach picnic area on the southwest side of the reservoir. The Colorado River exits Shadow Mountain Reservoir on its southeast side before flowing into Lake Granby.

Shadow Mountain Reservoir
Shadow Mountain Reservoir

Shadow Mountain Reservoir acts as a conduit between Lake Granby and Grand Lake, helping maintain a constant surface elevation in Grand Lake when water is being diverted through the Adams Tunnel.

Shadow Mountain Reservoir has a capacity of 17,354 acre-feet of water, 1,337 surface acres, 8 miles of shoreline, and a maximum depth of 37 feet. The reservoir was built between 1944 and 1946 at a cost of $1.3 million.

Shadow Mountain Boating and Fishing
Shadow Mountain Reservoir is in the Arapahoe National Recreation Area, a 36,000-acre scenic area. Boaters, anglers and other visitors use Shadow Mountain Reservoir, Grand Lake and Lake Granby throughout the year.

Small boats can navigate between Grand Lake and Shadow Mountain via a connecting channel. For campgrounds, picnic areas and boat launches in the vicinity of Shadow Mountain, Lake Granby and Grand Lake, see the C-BT Recreation - West Slope page.