North and South Revolutionary Redoubts 10am-1PM Location: North Redoubt Trailhead, Snake Hill Road, Garrison, NY 10524 Registration: $12 members, $15 non-members Description: This history hike of the North and South Redoubts will discuss the history of chaining the Hudson during the Revolutionary War and how the redoubts helped defend the chain, the river, and the Continental cause. More Info and Tickets: www.putnamhistorymuseum.org/events