Bonnechere Valley.

Bonnechere Valley is a rural Renfrew County township anchored by the village of Eganville, where the Bonnechere River cuts through the valley between the Algonquin Highlands and the Ottawa Valley. About 8 km east of Eganville on Fourth Chute Road, the Bonnechere Caves drop visitors below the river through Ordovician limestone passages exposing marine fossils — cephalopods, trilobites, and gastropods set into the cave walls — on guided tours running late May through Thanksgiving.

The township was formed January 1, 2001 by amalgamating the village of Eganville with the townships of Grattan, North Algona, and Sebastopol, and includes the hamlet of Foymount in the southwest, sitting at roughly 520 metres elevation on a former Pinetree Line radar station site (closed 1974) — one of the highest occupied points in southern Ontario. The Bonnechere River corridor through the township carries flatwater paddling, smallmouth bass and walleye fishing under FMZ 15, and a Highway 41 scenic drive that connects Eganville south toward Pembroke and west toward Algonquin Park's east-side gateways.

Bonnechere Provincial Park, despite the shared name, sits downstream toward Round Lake outside the township boundary.