Castles between Trevignano Romano and Formello

The ride

Roll out of Trevignano Romano and the road soon points you past Rocca Orsini, a castle, before the route slips into the Bracciano-Martignano nature reserve. Onward through the Valle del Treja and Veio nature reserves, with the Galeria Antica nature reserve still to come. The loop closes past Castello Orsini-Odescalchi, another castle, and back to where you started.