A long-time tradition, the Mad-City Ski Team offers free shows throughout the summer (end of May-Sept). Wander down to the shores of Lake Monona (next to Monona Terrace) on most Sunday evenings. Spread out a blanket, site back and marvel at the skills of these local athletes. Show start 5-ish and goes until 7:30-ish. Come early to get a decent parking spot. Be sure to check their calendar for dates and competitions.