Krosová 12° is a cross/trail running race held at the football field in Velešín, South Bohemia, in mid-November. Participants can choose between 12 km and 6 km distances, both run on a 6 km lap. The 6 km race begins at 10:00, followed by the 12 km race at 11:00. Cyklo Velešín organizes the event, with Karel Růžička as the listed organizer. The entry fee is 200 CZK.
The course combines asphalt with forest and field paths around Velešín and the Římov dam, offering more variety than a road race. Each lap involves approximately 100 m of climbing over rolling terrain. Men complete two laps, while women and juniors run one lap. The race is named the Marek Voráček Memorial and is part of the Grand Prix for endurance runners of Kamenný Újezd and Velešín. Support for the event comes from the town of Velešín and local businesses OKOV and Stavební prodej J+K.