Thunderhawk is a Lake County Forest Preserve course, and was designed by Robert Trent Jones Jr., and plays to 7,136 yards, 136 slope from the back 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 greenside, and the greens are mildly undulating and quick. Interesting layout with some quirky, yet fun holes.