Starting from Rignat, this loop trail winds at the foot of Mount Pilon through the Vieudrin Forest before joining the Bohas Forest along the Suran River. The trails are lined with low stone walls and karst sinkholes.
Highlights: the Rignat and Gravelles vineyards (round trip), the Biolière ford, the Suran Gorges, and the Plan Corneil ford (round trip), views of the Bugey region, the “4 Bornes” site, the charcoal kilns, the church in Bohas, Bohas Castle, ...
Other starting points:
- Bohas Town Hall
- Gravelles (small junction)
Water sources:
- Rignat, church square
- Moinans, church square