Best known as a major rookery for Double-crested Cormorants, this lake often hosts ducks, grebes, and herons as well.
From Northern Arizona Audubon Society

Scholz Lake, tucked into a shallow gorge at the western edge of Garland Prairie, may be the best-kept hiking secret in Kaibab National Forest. This probably is because most hikers instead make a beeline for such nearby superstar destinations as Sycamore Rim Trail, Overland Road Historic Trail, or the strenuous routes on Bill Williams Mountain.

The high-altitude lake is open year-round. However, the northern end is closed from Feb. 1 through Aug. 1 every year to allow waterfowl and raptors to nest in peace.

From Flagstaff, take I-40 west to Parks (Exit 178). Go 11.4 miles south on Garland Prairie Road (aka FR-141, a mix of pavement and sedan-friendly gravel) to FR-62 and the signed turn-off for Scholz Lake. Turn right and drive 1 mile to the trailhead. FR-62 is good dirt for 0.5 miles. After that, it gets rougher but is passable in a carefully driven sedan. There's a parking circle just before the road degrades for those who prefer to avoid the potholes and walk an extra half-mile. There's a restroom at the trailhead. Day use only.

The AllTrails website has a description and map of a hike at Scholz Lake.