The Lomnická etapa serves as the traditional opening stage of the Moravský UltraMaraton, or MUM. It begins and concludes in Lomnice u Tišnova, establishing a consistent starting point for the week-long running event. The field is substantial for a challenging local ultra stage, with 146 participants noted in the original record.
The course follows a hilly loop crossing nine valleys and mountains, featuring 941 meters of elevation gain and an equal amount of descent. The event attracts notable Czech ultrarunners alongside regular MUM participants; founder Tomáš Rusek was present with the organizing team, and Dan Orálek competed. Race conditions can influence the stage: the described run commenced under warm sunshine before overcast skies developed later.