Schubert's Wanderer Fantasy, D. 760, is a virtuosic masterpiece that ingeniously weaves themes from his earlier Lied 'Der Wanderer' throughout its four movements. It's a work of immense energy and structural sophistication.
Conquering the sheer technical demands, including rapid scales, arpeggios, and dramatic outbursts, is crucial.
Wanderer Fantasy in C major (D. 760) is rated Henle level 8 of 9 — concert repertoire, roughly diploma level. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 8 — meaning you can already play level 7–8 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Wanderer Fantasy in C major (D. 760) lasts about 25 minutes.
Wanderer Fantasy in C major (D. 760) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.