The South Slopes route is described here:  https://www.14ers.com/route.php?route=snef1&peak=Mt.+Sneffels

We track the car-to-car FKT from the lower TH at 11,350'.  Runners may also record splits for the round-trip from the upper (4WD) TH at 12,460', which has a Strava Segment.  From the lower TH it is 6 miles RT, with 2900' of elevation gain.

From the beginning at Präbichl, the Hochschwab Überschreitung takes you over the whole Hochschwab massiv, including the highes peak of the massiv, the Hochschwab. 

The rout is about 38 kilometers and about 2000 vertical meters. Usually the route is done in 2 to 3 days.