Part of the Conservation Area - Castle Hill (s.25 - Stewardship Area) but there is no negotiated right of way at present and there has been no agreements for recreation access with DOC.
Castle Hill Station has lambing from October 1st to the 1st of December, please do not access this area in that time.
Check https://www.doc.govt.nz/map/index.html for the location of recent marginal strips which show a access route along the Thomas river or through Gorge Hill. This maybe a viable route, but a better one is perhaps through Gorge Hill staying on Stewardship Land the whole way.