What's the history of the Underground Railroad in Michigan?

There are 34 confirmed sites in Michigan linked to the Underground Railroad, and likely many more unofficial sites that aided in the network to help enslaved people seek freedom. Michigan was often a last stop on the journey north to Canada, which ended slavery nearly 30 years before the United States. Two sites in Oakland County; the burial site of a formerly enslaved couple and that of an abolitionist, were added to the official Underground Railroad Network to Freedom in 2022; the registry is run through the National Parks Service.