This trail is slightly easier than the variant over the summit of Dossen, when the rocks are free from snow.: From the Dossensattel (saddle) follow a band, initially descending, along the NW-flank of the Dossen. (Bänderweg”). This leads, crossing several ribs and runnels, to the snow or boulder slope southwest of the Dossen (cairns and tracks mark the way and bolts protect the exposed bits) In late summer, the passage to the glacier can be problematic, therefore, in 2023, the mountain guide association Haslital established a new variant with bolts 40 m below the old route; see topo, start coordinates 2 655 292 / 1 166 471, approx. 3017 m. The bolts of the old access variant were left in place. As long as there is still a lot of snow on the glacier, it may be easier to reach the glacier from the old variant by abseiling. In the ascent (south-north direction), however, the new variant is recommended. Now follow the glacier southwards, passing to the right (west) of the Ränfenjoch (3043 m) and the Ränfenhorn (3225 m). Make the gentle climb in a south-south-west direction, coming close to the Westliche Wätterlimi at P. 3250. In an arc south around P. 3507 and up the snow slope north of the Rosenegg up to the fore-summit (P. 3643) of the Rosenhorn. [Note: If you come from the Ränfenjoch, you can get onto the NW flank of the Dossen by descending northwards below the rocks of the Dossen S ridge, to leave the glacier's eastern edge around 3020 m.]

From the saddle climb a 5m step slightly left of the ridge, and then follow the ridge more or less directly via corners and steps to the summit - 1hr from the saddle and grade III at most. From here descend the snow and/or boulder field in a south-westerly direction to gain the upper eastern edge of the Rosenlauigletscher (glacier) at around 3020m. (2022 fixed rope or abseil).Now trend southwards to gain the Ränfenjoch 3040 m and on to the moderately steep snow slope of the Ränfenhorn. Climb this (southeast direction) to gain the summit rocks north of the summit, then follow these to the highest point (3255 m). Alternative: Instead of descending south-west onto the glacier, the Dossen can be crossed in its entirety via P.3144, past several bivouac sites down to the Ränfenjoch where you enter the glacier.

Follow the ridge directly without much difficulty to the main summit.

Descend the ascent route.