May be approached from the NE i.e from Tievnabinnia or from the NWW via Barrclashcame. This route describes the latter. Parked at viewing point lay-by at L824 699 A, which is marked by a Doo Lough tragedy memorial. Head east for 1.5km towards the NW Top, and the ground starts to rise sharply, and is long grass hiding multiple holes etc. It eases after 300m and is more navigable, short grass and rocks. Having ascended the Barrclashcame NW Top, turn SE for 1km - going is grassy but firm. After dipping to about 520m it starts to rise again, gently at first, but then very steeply. There is a large rocky scramble for about 100m at point L844 694 B which spectacularly overlooks Doo Lough, and which could be dangerous in poor conditions. Now turn NE for a gentle ramble of 500m to reach the summit cairn of Barrclashcame, which sits in a featureless grassy area. Continue directly east for about 500m, crossing a very narrow ridge which drops sharply to both sides. This is easily navigable in good conditions, but could be tricky on a windy day or in poor visibility. Turn SE at point L855 694 C and simply follow the natural contour of the ridge in a semi-circular direction for about 800m, which will take you to the summit trig pillar sitting amid a broad grassy area. Great views of Croagh Patrick to the north and along the way you have a good view of Tawnyard Valley, the Ben Gorms, Mweelrea ridge and lots more! Recommend allowing 3 hours from car to top. Linkback: https://mountainviews.ie/summit/67/comment/4827/

Tievummera is in the middle of the 5 km long skyline of the Sheefrys which remains over 700m. It has sharp northern sides falling down into the corrie containing Lough Brawn and big slopes curving down into Glenummera to the south. For a traverse east to west see Tievanbinnia, East Top and Tawny Rower for first parts of walk. Having climbed Tievnabinnia all the hard work is done as it is now no more than a gentle stroll SW along the northern slopes on very good ground, past a group of little loughs. This leaves all the time necessary to take in the fantastic views along the Sheefrys (pic is looking back to Teivnabinnia and across to Croagh Patrick) and to the north and south as walk. The views across the valley to Ben Creggan are particulary good here but nearly all the mountains on any map of the area are within eyesight. I wouldn't even try this walk without good weather as the views make it. Leave the slope edges to make for the visible trig point and an easy climb. There is the remains of an old fenceline going south and the remainder of the walk to clashcarne to the west. As continue the imposing southern slopes of Clashcarne come into full view, dropping down to Doo Lough with Mweelra behind and it is a short drop to the col with Clashcarne (see for next part of traverse) Linkback: https://mountainviews.ie/summit/67/comment/1115/

attached two pics taken in this vicinity on New Years Eve'04. They show views to the S. and SW over Delphi and towards the 12 Bens. more conventional shots were also taken toward the north Linkback: https://mountainviews.ie/summit/67/comment/1397/

A traverse of the Sheeffrys on a good day offers so much-cliffs, ridges, endless views and stunning scenery. I had read that this range is little frequented, and on the day I traversed it I didn't meet a single person in many hours of hiking. This photo shows the view west from near the summit of Tievummera. Barrclashcame is in the distance. Also visible are a sample of the cliffs and rugged landscape that are a constant companion on this high level walk. Linkback: https://mountainviews.ie/summit/67/comment/3331/

I'm mentioning this Schwartz Critchley YouTube film here because you'll be browsing in this area if you're considering a Sheeffry Traverse and hopefully you'll see my note. My message is simple. This beautifully filmed piece will greatly enhance your preparations and you would be stone mad not to watch it. The YouTube Summary says:
"This 27 km hill-walk across County Mayo's Sheeffry Hills takes in 7 summits: Tawnyard, Tievummera, Barrclashcame, Barrclashcame North-West Top, Tievnabinnia, Tievnabinnia East Top and Tawny Rower. It is one of the finest treks in Ireland, offering benign walking terrain and fabulous 360 degree views of Achill Island, Clew Bay, Croagh Patrick, the Nephin Begs, Devilsmother, the Maamturks, the Twelve Bens, Ben Gorm, Mweelrea and Doo Lough. Although a relatively easy and straightforward walk in good weather, be warned: this route is challenging and dangerous in places in poor visibility."
Martin has uploaded the route here at Track 2539 so that means that Sharron and he have put the entire package together for the intending walker.
The film "still" shows the view from Barrclashcame to Tievummera. If you expand the photo and look closely at the gentle col in the middle of the frame you will just about see the tiny figure of a hillwalker heading away from you. This will give some idea of the massive space occupied by the mountain itself Linkback: https://mountainviews.ie/summit/67/comment/17714/

St. Patrick's Day, 2018. Halfway through this traverse I was listening to radio commentary as Ireland won a famous Grand Slam! I decided on an E-W traverse as it seems nicer to be walking towards the sea, and parked at the entrance to a wood, several kms up the valley (see route 3744). The weather conditions on the hills today were among the most challenging I've met in many years. The almost gale force North Easterly winds made walking very difficult and the associated wind chill was predicted to be -10C to -15C. I needed to be extra vigilant with my footwork as a twisted ankle or knee would make life less than ideal! The visibility was poor on the way up to the ridge but improved quite a bit. I left my bike at the finish for the 4-5 km cycle back to the car - I hate road walking! Apart from the weather conditions on the day, this is one of the great walks in Ireland. Best to keep it for good weather, Linkback: https://mountainviews.ie/summit/67/comment/19869/