There are two starting points for the direct ascent of A' Mharconaich and several permutations if it is being climbed in conjunction with other hills as it usually is. One route starts on the A9 at the top of the Pass of Drumochter at grid reference and goes up Coire Dhomhain for just over a kilometre and then ascending NW to the col between A' Mharconaich and the Boar of Badenoch from where the line of fence posts is followed steeply to the summit ridge. This starting point can be used for a complete circuit of Coire Dhomhain taking in the other two Munros of Sgairneach Mhòr and Beinn Udlamain.