36km, 3500m ascent, 2900m descent, some 20 summits, 16h45, following the spine of the Brienzer Rothorn massif, including some of the best grass ridges in the Alps. Preface There's a fun exchange of comments in another Hikr report:   Übernachtet habe ich im Hotel Rothorn-Kulm, wie das wohl alle tun (Nik...