San Agustín-Santo Domingo-Valle del Jarama-El Espartal

Route with some rollers and the less attractive part of having to cross El Molar. It is also possible to start at the San Agustín treatment plant. A variant to avoid a steep descent from the El Molar watchtower halfway (around km 35) is to take the Canal path to the right or west, which passes north of the industrial area, descend to the town, and close the circuit. If, using this variant, you reach the San Agustín cemetery area, you cross the town and the road to Colmenar, descend to the Valdelagua residential area, go under the A-1 and take the path north from the Canal treatment plant to close the circuit. All this last part is to connect with the San Agustín area. If you want to avoid El Espartal, around km 21, there's a shortcut to save about 5 km and asphalt.