See also Gîtes d'étapes (walking hostels) for simple accommodations for groups outside the summer season.

Gîtes des Pics in Riverenert (COUSERANS) (max 24 in 2 gîtes)
Two renovated barns on a mountain farm at 700m elevation a few kms from Saint Girons can be rented together.

Maison Jacotte in Soulan (COUSERANS) (sleeps 16 in 4 bedrooms)
A large house/hostel in a mountain hamlet in one of the Massat valleys, available with meals or as self-catering rental. Has a large room suitable for events and gatherings, workshops, etc.

 
La Maison du Valier in Bordes-sur-Lez (COUSERANS)(sleeps 40; restaurant)
This gîte-auberge is located within the Mont Valier natural reserve at the point of departure for climbing to the summit. It's accessible by car.

  
Haras Picard du Sant in Lasserre (COUSERANS)(2 gîtes + B&B can accommodate up to 36 people. Has 40 m2 meeting room.)
Gîtes and B&B on a Mérens horse farm in the Volvestre area.