COVID-19 Updates

Recent updates. Arboretum gardens, trails, and parking lots are open 7 a.m. to 10 p.m. The Visitor Center is closed and in-person programs are on hold until further notice. See Events for virtual programs. We continue to follow UW–Madison guidance and recommendations about the Visitor Center and in-person programs… Read More

Events & Classes

All events are free and begin at the Visitor Center unless otherwise indicated.

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Monarch butterflies overwintering at Cerro Pelon Sanctuary, Mexico.

Monarch Winter 2020–21 Population Numbers Released

According to newly released data, the population of monarch butterflies in Mexico wintering sites decreased by 26 percent over last winter. On February 25, 2021, the World Wildlife Fund-Telmex Telcel Foundation Alliance, in collaboration with the National Commission of Protected Natural Areas (CONANP) and the National Autonomous University of Mexico…

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