Stepping up . . . Past and present Knox College residents (from left) Erin Roxburgh (20, back), Grace Hoskins (19), Nick Brown (21), Jimmy Matangi (19), James Matthews (19), Blair Donaldson (18), Luke Pienaar (19) and Grace Herdman (19) will run the Dunedin Marathon to raise money for Motor Neurone Disease NZ. PHOTO: JESSICA WILSON