Thunderhawk is a Lake County Forest Preserve course, was designed by Robert Trent Jones Jr., and plays to 7,031 yards, 73.8/136, course/slope ratings from the back tees with three shorter tees. It's located in Libertyville near the Wisconsin border off I-94.
The layout is forgiving with wide fairways, along with a few good solid risk/reward type holes through the forest, marsh and meadows. The bunkers guard the front and sides of the greens which are mildly undulating and quick. Interesting layout with some quirky, yet fun holes.