Nearby state and local parks and recreation areas include:

World-class fishing
Canoeing/kayaking
Boating
Picnicking
Swimming
Skiing
Water cruises
Horseback riding
Snowmobiling
Nature watching
Biking trails
Golf

Helpful Links:

Wisconsin Tourism Information:
Travel Wisconsin
Walworth County Visitor's Bureau

Wisconsin State Parks:
Dept. of Natural Resources
State Parks & Recreations

Wisconsin Golf Courses:
Wisconsin4Golf

Delavan Chamber of Commerce

Wisconsin Online (look for Walworth County and other surrounding counties)
Search by keyword to find exactly what type of events you are looking for.

The Week Extra for local events.