ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti sˈɪks, ðə pˈoːɹʃən ʌvðə pˈɑːɹk ðæt lˈaɪz wɪðˌɪn ðə tˈaʊn ʌv mˈɪdəltˌaʊn, sˌʌm wˈʌnhˈʌndɹɪd θˈɜːɾi ˈeɪkɚz, wʌz ˈædᵻd tə ðə nˈæʃənəl ɹˈɛdʒɪstɚɹ ʌv hɪstˈɔːɹɪk plˈeɪsᵻz æz pˈɑːɹt ʌvðə wˈɑːdswɜːθ ᵻstˈeɪt hɪstˈɔːɹɪk dˈɪstɹɪkt.
In 1996, the portion of the park that lies within the town of Middletown, some 130 acres, was added to the National Register of Historic Places as part of the Wadsworth Estate Historic District.