There is a car park close by the hotel in Bridge of Orchy. Begin the walk by crossing the road and following the lane signed for the train station.Follow the lane to the right (ignoring the level crossing ahead) towards the station, following the West Highland Way. Pass under both sides of the railway line using the underpass. Go through a gate onto a track, and then leave the West Highand Way, crossing the main track and instead taking a stony one to pass to the left of a transmitter mast. The broad path continues uphill, and then forks. Take the right hand branch, which climbs the moorland keeping to the right of the Allt an Dothaidh. The climb out of the corrie involves a steeper section of path which has become badly eroded. There's then an upper coire before the final climb up to the bealach at 744m. Both Munros can be tackled from here, and it matters little which you climb first. For Beinn Dorain, follow the path that clibms southwards, passing over some slabby rocks at first, before gaining a grassier plateau. Continue along the path which twists and turns before climbing up to gain a better defined ridge.The path forks at one point - the right hand branch keeps below the ridge and passes to the west of both the summits before cutting back to the top from the far side. It's better to stay on the main, left-hand, path which continues along the ridge a large cairn. On the main path, continue from Sasunnaich to the next bealach and then follow the ridge up to the true summit of Beinn Dorain. This time follow the path towards Beinn an Dothaidh. This climbs northeast across the slopes at first to avoid a steep section; beyond it the path continues up very broad and grassy slopes before becoming boggy and somewhat lost around Coire Reidh. Continue across the boggy area to regain a path which climbs up to the bealach between the main summit of Beinn an Dothaidh and its more distinct southern top.Head north to reach the true summit of Beinn an Dothaidh at 1004mCross