Beside the route described above, the summits may also be reached starting from the A83 Rest-and-be-Thankful road through Glen Croe to the west, by following the rocky south-eastern ridge up from Loch Long, or from the Bealach a' Mhàim. This bealach, at , allows Ben Arthur to be combined with some of the other Arrochar Alps, such as Beinn Narnain and Beinn Ìme.