If you want to ski down the mountainside, you'll need to make your way to the top of it first. Hop on DSB Ifenhütte and enjoy the ride.
You're spoiled for sightseeing choice when staying in Mittelberg. DSB Ifenhütte is a great place to begin here, but there are lots of other worthy attractions to consider. Breitachklamm, Fellhorn / Kanzelwandbahn, and Hoher Ifen are near the mountainside transportation system and will top off your day nicely.