Each year, Woldumar Nature Center — a private, non-profit organization — attracts some 40,000 visitors from across mid-Michigan. We offer numerous outreach and on-site Environmental Education programs for children as well as adults. More than 5 miles of trails await you on 150 acres of woodland, prairie, river-side and pine forest! Hike or ski anytime between dawn and dusk. Situated along the Grand River with 1.25 miles of shoreline, Woldumar represents one of the most diverse ecosystems in the region.