From St Arnaud drive 35km toward Blenheim on SH63. Just beyond the Branch River turn right and follow a hydro road for about 8km to an aerial cableway at the Branch/Leatham confluence. For climbs from the Leatham valley, continue past the cableway, without crossing the river, to Leatham Station. Beyond the station, it is usually okay for 2WD cars as far as Boulder Stream. The Leatham Conservation Area is now administered by DOC.