The main objective of this work is to carry out a formal analysis of the work Tres piezas montañeras pa clarinete solo by the Colombian composer Jaime Jaramillo Arias. The aim is to carry out a detailed review of compositional aspects at the melodic, rhythmic and harmonic level, if any, and their relationship with the techniques and interpretative elements in order to provide sufficient tools for a deep understanding when approaching the three pieces that make up this work. On the other hand, the score has been re-edited, adding indications of character, tempo, dynamics and articulation. This revision of the score has been done in conjunction with the composer, so that one of the contributions of the work will be to present the final edition of the score in accordance with the aforementioned contributions.