Isthmian is a thoroughbred horse born in Australia in 2013. Race horse Isthmian is by I Am Invincible (AUS) out of Amber's Arion (AUS) , trained by Kris Lees. Isthmian form is available here. Owned by J V O'Neill, P W Rogers, B G Gowing, T J O'Malley, Estate Late G G Cooke, C J Robertson, S J Rayner, Dr T J O'Sullivan, Mrs K G Brown, W E Skinner, J J Orman, A J Peppper, I Bruce, Mrs J D Bird & Niugini Racing (Mgr: R M Allport).