Heyburn State Park
... that Idaho's Heyburn State Park is the oldest state park in the Pacific Northwest?
... that <a href="./List_of_Idaho_state_parks" id="mwEuk" rel="mw:WikiLink" title="List of Idaho state parks">Idaho's</a> <b id="mwEuo"><a href="./Heyburn_State_Park" id="mwEus" rel="mw:WikiLink" title="Heyburn State Park">Heyburn State Park</a></b> is the oldest <a href="./State_park" id="mwEuw" rel="mw:WikiLink" title="State park">state park</a> in the <a href="./Pacific_Northwest" id="mwEu0" rel="mw:WikiLink" title="Pacific Northwest">Pacific Northwest</a>?