Brdskými Hvozdy is a Czech trail series held in Spálené Poříčí, located in the Plzeň-South District of the Plzeň Region. It features three off-road distances: 43 km, 105 km, and 135 km. The longest race is typically scheduled for late June, with the shorter two taking place in early July.
The races traverse Czech paths and forest trails, defining it as a mountain-and-woods event, distinct from road races. The 43 km route involves a 1,360 m ascent, the 105 km route a 3,150 m ascent, and the 135 km route a 4,440 m ascent. All three distances are UTMB Index races, with the 135 km being the most challenging and popular choice.