Krčský lomcovák is a 5 km cross/trail race held in Krčský les, a forest area in Prague 4. The main race begins in the early evening at Velký altán, preceded by an earlier category. The entry fee is 50 Kč. Locally, it is also known simply as “Pětka,” Czech running shorthand for a five-kilometre race.
The course crosses hilly forest terrain, making it a short race but not a flat road time trial. SABZO Praha organizes it, with Jana Chlupatá listed among the organizers. SABZO also awards the cups. The event has reached double-digit editions, and one of its prizes is linked to the association of amateur runners from foreign trade.