The trial to Lower and Upper Chicago Lake offers up amazing views of Mount Evans Wilderness. You'll see moose, mountain goats, elk, and big horn sheep.
From the parking lot, stay to the right of Echo Lake and you will run into the Chicago Lakes Trailhead. Follow the switchbacks down and across Chicago Creek. After crossing the creek, follow the sign indicating that the trail follows the dirt road and hang a left; from here, you'll reach the Idaho Springs Reservoir is a little over 1.5 miles. Continue past the reservoir and past the cabins to reach the Mount Evans Wilderness Area Boundary, and shortly after you will pass through the reservoir fire area that burned more than 400 acres in 1978.
You'll reach Lower Chicago Lake in just 3.95 miles. To get to the Upper Chicago Lake, head back to the Chicago Lakes Trail and continue another mile. This is a popular breeding area for big horn sheep and mountain goats in the late spring and early summer, so keep an eye out for them on the valley walls.
The weather in the Mount Evans Wilderness can change rapidly; be prepared for high winds, snow, rain, hail, and intense sunlight. Make sure you get an early start to avoid storms (and the crowds).