Beinn Tarsuinn is often climbed in conjunction with the neighbouring peak of Cìr Mhòr, to which it is linked by a rocky ridge forming the subsidiary top of A' Chìr. The crossing of A' Chìr involves scrambling, however the two peaks can be linked without crossing A' Chìr by means of a path that traverse the ridge's western side. The simplest and shortest route up Beinn Tarsuinn is via one of the two ridges on either side of the Coire a' Bhradain; both ridges drop down into Glen Rosa, the usual access for most walkers to this group of hills.