Sisters State Park
... that Whychus Creek, a perennial stream that flows through Sisters State Park, has its headwaters in the Three Sisters Wilderness area of Oregon?
... that <a href="./Whychus_Creek" id="mwCpU" rel="mw:WikiLink" title="Whychus Creek">Whychus Creek</a>, a perennial stream that flows through <b id="mwCpY"><a href="./Sisters_State_Park" id="mwCpc" rel="mw:WikiLink" title="Sisters State Park">Sisters State Park</a></b>, has its headwaters in the <a href="./Three_Sisters_Wilderness" id="mwCpg" rel="mw:WikiLink" title="Three Sisters Wilderness">Three Sisters Wilderness</a> area of <a href="./Oregon" id="mwCpk" rel="mw:WikiLink" title="Oregon">Oregon</a>?