Beautiful state park with tons for everyone! Several hiking trails with a variety of ability levels, clean beach for swimming, boat rentals, fishing, etc. The campsites were well-kept and the showers were clean. The hiking was good, but the trails weren't always clearly marked. That aside, great place to visit and a quick day-trip from Madison, WI.
Description from website: Founded in 1911, Devil's Lake is the third oldest state park in Wisconsin, the largest, and the most visited. Devil's Lake offers magnificent views from 500-foot quartzite bluffs overlooking a 360-acre lake. Enjoy lakeshore picnic areas, sandy swimming beaches, 29 miles of hiking trails, or ease into the backcountry solitude. Devil's Lake is a beautiful year-round park with an intriguing natural history along the 1,000-mile Ice Age National Scenic Trail.