A large portion of the 1,000-acre park has been left in its natural state and has an abundance of wild flowers, plants and wildlife. It is not uncommon to see beavers, turkeys, muskrats, ducks, shore birds and white-tailed deer. Many of the park's hills and valleys were once campsites of Native American tribes and artifacts were uncovered when the dam was being constructed. Visitors can enjoy picnicking, camping, hiking, swimming, boating and fishing. The Viking Lake campground is one of the most popular in southwest Iowa. The spacious, shady campground is located on the lakeshore. There are 120 campsites (94 with electrical hookups, 22 full service, 9 buddy sites, and 26 non-electrical), modern rest rooms and showers and a trailer dump station. A playground is located in the campground. Hiking trails totaling six miles provide visitors an excellent look at the park's natural features. The Bur Oak Nature Trail and its accompanying booklet provide insight on many of the important shrubs, plants and trees found at Viking Lake. The one mile trail takes abut one hour to walk. In winter, snowmobiles may be operated on designated trails. The 137-acre lake was constructed in 1957 and is 44 feet at its deepest point with many bays and projecting points on its four and one-half mile shoreline. Viking Lake is well stocked with crappies, bluegills, bass, bullheads and catfish. A sandy beach is located on the west shore with unsupervised swimming.