Nestled among them is a visitor center that just reopened with a facelift worth $1.25 million. The Hartwick Pines State Park in Grayling is doing a limited reopening of its visitor center after it’s been closed off to guests since June. of Natural ResourcesDespite its popularity, Hartwick Pines’ visitor center hadn’t been updated since its construction in 1994. Hartwick Pines State Park received $1.25 million for its visitor center through the American Rescue Plan Act funding. Make a state park your homebase this summer: Hartwick Pines and others need volunteer hosts