Complex sentence: After the regular boat trains were ended, it was still occasionally used for special trains, the last running in 1999, but the track and station are no longer used at all, although they are still extant and part of the rail network.
Split into simpler sentences: After the regular boat trains were ended, it was still occasionally used for special trains, the last running in 1999. Rhe track and station are no longer used at all, although they are still part of the rail network.