Ozaukee County is home to almost 40 miles of the Milwaukee River, and comprises close to 30 percent of its acreage in wetlands, providing rich wildlife habitat. On June 16, the Treasures of Oz event will include celebrations at eight sites along the river and selected inland bogs and marshes.

This day is an opportunity for hiking, photography, geocaching and learning about how water impacts everyday life.

Tendick Nature Park features trails and boardwalks through wetlands and forest, as well as disc golf, archery, canoeing, kayaking and fishing. The park team will be available as guides.

Riveredge Nature Preserve is an ecosystem with trails and a sturgeon repopulation facility. Offerings include: tours from 9 a.m. to 1 p.m.; habitat work from 9 a.m. to noon; and a nature walk at noon.

Cedarburg Bog State Natural Area is a conifer swamp, with forests, marshes and bog lakes. Guided nature walks will be offered at 9 a.m., 10:30 a.m., noon and 1:30 p.m.

Bike Path Island is an important habitat site where researchers are monitoring water quality and species. Paddlers are welcome to stop and explore here.

Grafton Historical Corner will host a DNR fisheries biologist, who will discuss how the area developed, declined and reemerged, and The Grafton Blues Association will tell its musical history.

Mequon-Thiensville Dam is part of the Fish Passage program, which enables fish to migrate to spawning and rearing areas upstream. Visitors can walk along the fishway and take a pontoon boat tour.

Ulao Waterfowl Production Area is home to many water birds and songbirds. Experts will be onsite to discuss the area and its inhabitants.

Forest Beach Migratory Preserve protects water and habitat for native and migratory birds. Visitors can hike trails, observe birds, visit exhibits, enjoy food and music and more. Tours are from 9 a.m. to 3 p.m.; celebration is from 1 to 6 p.m.

For more information, visit TreasuresOfOz.org.