Mel Bonis, a significant late-Romantic composer, crafts a Boléro that is both rhythmically faithful and harmonically sophisticated. It stands out for its graceful lines and typical French Romantic keyboard refinement.
Focus on achieving a supple, seamless left-hand accompaniment that never interrupts the phrasing of the right-hand melody.
Comparable difficulty and character — good candidates for what to learn next.
Boléro (Op.177) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Boléro (Op.177) lasts about 5 minutes.
Boléro (Op.177) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Boston-valse by Mel Bonis, Ballade by Mel Bonis, Barcarolle-Etude by Mel Bonis — see the full similar-pieces list on this page.