Flow trail type route with a succession of sections built with mechanical means that, in a series of sections of increasing difficulty, will delight cyclists in progression, who want to progress in all types of modules and bike park type obstacles.
From the line of trenches dug during the civil war in the mountain range between Peña Castro and Sierro de las Meriendas, we take the first sections of the flow trail. The line of trenches, although colonised by a young oak grove, is still visible to cyclists accessing along R2 and A22. In fact, those coming from Llombera on the R2 will have to ford the line of trenches a few metres before reaching the start of the trail.
Approximately once we have covered the first third of the trail, we will follow a linking forest road that leads us to the next section of the flow trail that, from the north-western slope of Sierros de San Martín first, and then along its southern face, will take us towards the vicinity of Alcedo de Alba and La Robla.
In string of Los Sierros, those who take the trouble to look for it will find a network of trenches, not excavated but mainly built using the rock formations of the Sierros themselves, which is certainly worth a visit.
