Parco naturale del Bosco delle Sorti della Partecipanza di Trino, Regional park in Trino, Italy.

Parco naturale del Bosco delle Sorti della Partecipanza di Trino is a regional protected area of 1,907.94 hectares in the Vercelli province, established in 1991. It preserves one of the last lowland forests of the Po plain, with oaks and poplars as the main trees and over 400 plant species. The woodland stands isolated amid extensive rice paddies.

The area was probably a sacred wood in Roman times. In 1202 Boniface I, Marquis of Montferrat, granted the use of the woodland to the Partecipanza, an association of families. Medieval rules on wood extraction and felling kept the forest standing as the Po plain was cleared.

The name Partecipanza refers to the association of families that has shared use of the woodland since 1202, when Bonifacio I, Marquis of Monferrato, granted it. Membership passed down through generations of Trino families, and the body still sets rules on wood collection and felling. The park is twinned with the Réserve des Cascades de Banfora in Burkina Faso.

Multiple entrance points provide access to the park, with the main route starting from Cascina Guglielmina and offering trails of varying lengths. Sturdy footwear is recommended, and visitors should plan enough time to walk at a comfortable pace through the wooded areas.

The park is twinned with the Réserve des Cascades de Banfora in Burkina Faso. Its medieval rules on wood extraction and permitted felling, still applied today, explain why this fragment of Po plain forest survived amid the surrounding rice monoculture.